YAHOO INC
SC 13D, 1999-04-09
COMPUTER INTEGRATED SYSTEMS DESIGN
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<PAGE>
                                       
                       SECURITIES AND EXCHANGE COMMISSION
                            WASHINGTON, D.C. 20549

                              -----------------

                                SCHEDULE 13D
                               (RULE 13d-101)

          INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT
         TO RULE 13d-1(a) AND AMENDMENTS THERETO FILED PURSUANT TO
                                 RULE 13d-2(a)
                               (AMENDMENT NO. )*

                                BROADCAST.COM INC.
- --------------------------------------------------------------------------------
                                (Name of Issuer)

                    Common Stock, par value $0.01 per share
- --------------------------------------------------------------------------------
                          (Title of Class of Securities)

                                   111310 10 8
- --------------------------------------------------------------------------------
                                 (CUSIP Number)

                                 Gary Valenzuela
Senior Vice President, Finance and Administration, and Chief Financial Officer
                                   Yahoo! Inc.
                             3420 Central Expressway
                          Santa Clara, California  95051
                                  (408) 731-3300
- --------------------------------------------------------------------------------
           (Name, Address and Telephone Number of Person Authorized
                     to Receive Notices and Communications)

                                 March 31, 1999
- --------------------------------------------------------------------------------
            (Date of Event which Requires Filing of this Statement)


If the filing person has previously filed a statement on Schedule 13G to 
report the acquisition which is the subject of this Schedule 13D, and is 
filing this schedule because of Rule 13d-1(e), 13d-1(f) or 13d-1(g), check 
the following box __

Note:  Schedules filed in paper format shall include a signed original and 
five copies of the Schedule, including all exhibits.  See Rule 13d-7(b) for 
other parties to whom copies are to be sent.

*The remainder of this cover page shall be filled out for a reporting 
person's initial filing on this form with respect to the subject class of 
securities, and for any subsequent amendment containing information which 
would alter disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be 
deemed to be "filed" for the purpose of Section 18 of the Securities Exchange 
Act of 1934 ("Act") or otherwise subject to the liabilities of that section 
of the Act but shall be subject to all other provisions of the Act (however, 
see the Notes).

<PAGE>

                                 SCHEDULE 13D

CUSIP No. 111310 10 8                                     Page  2  of 11  Pages

- -------------------------------------------------------------------------------
 (1) NAMES OF REPORTING PERSONS.  S.S. OR I.R.S. IDENTIFICATION NOS. OF ABOVE
     PERSONS

     YAHOO! INC.
- -------------------------------------------------------------------------------
 (2) CHECK THE APPROPRIATE BOX IF A MEMBER     (a)  / /
     OF A GROUP*                               (b)  /x/
- -------------------------------------------------------------------------------
 (3) SEC USE ONLY

- -------------------------------------------------------------------------------
 (4) SOURCE OF FUNDS*
     WC
- -------------------------------------------------------------------------------
 (5) CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO
     ITEMS 2(d) or 2(e)
- -------------------------------------------------------------------------------
 (6) CITIZENSHIP OR PLACE OF ORGANIZATION
     CALIFORNIA
- -------------------------------------------------------------------------------
NUMBER OF SHARES              (7) SOLE VOTING POWER
 BENEFICIALLY OWNED               7,811,008 (1)
 BY EACH REPORTING           --------------------------------------------------
 PERSON WITH                  (8) SHARED VOTING POWER
                                  17,400,272 (2)
                             --------------------------------------------------
                              (9) SOLE DISPOSITIVE POWER
                                  7,811,008 (1)
                             --------------------------------------------------
                             (10) SHARED DISPOSITIVE POWER
                                  0 (2)
- -------------------------------------------------------------------------------
(11) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
     25,211,280 (1) AND (2)
- -------------------------------------------------------------------------------
(12) CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*
                                                                           / /
- -------------------------------------------------------------------------------
(13) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
     56.0% (3)
- -------------------------------------------------------------------------------
(14) TYPE OF REPORTING PERSON*
     CO
- -------------------------------------------------------------------------------
                    *SEE INSTRUCTION BEFORE FILLING OUT!


*SEE INSTRUCTIONS BEFORE FILLING OUT!

(1) 7,333,300 of the shares of broadcast.com common stock, par value $0.01 
    per share ("broadcast Common Stock"), of broadcast.com covered by this 
    Schedule 13D are purchasable by Yahoo! upon exercise of an option granted 
    to Yahoo! as of March 31, 

<PAGE>

                                 SCHEDULE 13D

CUSIP No. 111310 10 8                                     Page  3  of 11  Pages

    1999 (the "Option"), and described in Items 3 and 4 of this Schedule 13D. 
    Prior to the exercise of the Option, Yahoo! is not entitled to any 
    rights as a stockholder of broadcast.com as to the shares of 
    broadcast.com Common Stock covered by the Option.  The Option may only be 
    exercised upon the happening of certain events referred to in Item 4, 
    none of which has occurred as of the date hereof.  Yahoo! expressly 
    disclaims beneficial ownership of any of the shares of broadcast.com 
    Common Stock that are purchasable by Yahoo! upon exercise of the Option 
    until such time as Yahoo! purchases any such shares of broadcast.com 
    Common Stock upon any such exercise.  Based on the number of shares of 
    broadcast.com Common Stock outstanding on March 31, 1999, as represented 
    by broadcast.com in the Agreement and Plan of Merger by and among 
    broadcast.com, Yahoo! and Alamo Acquisition Corp., a Delaware corporation 
    and newly formed wholly owned direct subsidiary of Yahoo! ("Newco"), 
    dated as of March 31, 1999 (the "Merger Agreement"), the number of shares 
    of broadcast.com Common Stock indicated represents 1.3% of the total 
    outstanding shares of broadcast.com Common Stock, excluding shares of 
    broadcast.com Common Stock issuable upon exercise of the Option.

(2) 17,400,272 of the shares of broadcast.com Common Stock covered by this 
    report are subject to a voting agreement (the "Voting Agreement") entered 
    into by certain stockholders of broadcast.com with Yahoo! pursuant to 
    which such stockholders have agreed to vote all of the shares of 
    broadcast.com Common Stock beneficially owned by such stockholders in 
    favor of the proposed merger of Newco with and into broadcast.com.  
    Yahoo! expressly disclaims beneficial ownership of any of the shares of  
    broadcast.com Common Stock covered by the Voting Agreement.  Based on the 
    number of shares of broadcast.com Common Stock outstanding on March 31, 
    1999, as represented by broadcast.com in the Merger Agreement, the number 
    of shares of broadcast.com Common Stock indicated represents 
    approximately 46.2% of the outstanding shares of broadcast.com Common 
    Stock, excluding the shares of broadcast.com Common Stock issuable upon 
    exercise of the Option (as described above).

(3) After giving effect to the exercise in full of the Option.

<PAGE>

                                 SCHEDULE 13D

CUSIP No. 111310 10 8                                     Page  4  of 11  Pages

ITEM 1 - SECURITY AND ISSUER

     This statement on Schedule 13D (the "Schedule 13D") relates to the 
common stock, par value $0.01 per share (the "Shares" or the "broadcast.com 
Common Stock"), of broadcast.com inc., a Delaware corporation 
("broadcast.com").  The principal executive office of broadcast.com is 
located at 2914 Taylor Street, Dallas, Texas 75226.

ITEM 2 - IDENTITY AND BACKGROUND

     (a) - (c)  This Schedule 13D is filed by Yahoo! Inc., a California 
corporation ("Yahoo!").  The address of the principal business and principal 
office of Yahoo! is 3420 Central Expressway, Santa Clara, California 95051.  
Yahoo! is a global Internet media company that offers a branded network of 
comprehensive information, communication and shopping services to millions of 
users worldwide.

     As a result of entering into the Voting Agreement described in Items 3 
and 4 below, Yahoo! may be deemed to have formed a "group" with each of the 
Stockholders (as defined in Item 3 below) for purposes of Section13(d)(3) of 
the Act and Rule 13d-5(b)(1) thereunder.  Yahoo! expressly declares that the 
filing of this Schedule 13D shall not be construed as an admission by it that 
it has formed any such group.

     To the best of Yahoo!'s knowledge as of the date hereof, the name, 
business address, present principal occupation or employment and citizenship 
of each executive officer and director of Yahoo!, and the name, principal 
business and address of any corporation or other organization in which such 
employment is conducted is set forth in Schedule I hereto.  The information 
contained in Schedule I is incorporated herein by reference.

     (d) - (e)  During the last five years, neither Yahoo! nor, to the best 
knowledge of Yahoo!, any of the executive officers or directors of Yahoo!, 
has been convicted in a criminal proceeding (excluding traffic violations or 
similar misdemeanors), or been a party to a civil proceeding of a judicial or 
administrative body of competent jurisdiction and as a result of such 
proceeding was or is subject to a judgment, decree or final order enjoining 
future violations of, or prohibiting or mandating activities subject to, 
Federal or State securities laws or finding any violation with respect to 
such laws.

ITEM 3 - SOURCE AND AMOUNT OF FUNDS OR OTHER CONSIDERATION

     All prior acquisitions of broadcast.com Common Stock by Yahoo! have been 
made using working capital of Yahoo!.

     Yahoo! entered into an Agreement and Plan of Merger dated as of March 
31, 1999, by and among Yahoo!, Alamo Acquisition Corp., a Delaware 
corporation and newly formed wholly 

<PAGE>

                                 SCHEDULE 13D

CUSIP No. 111310 10 8                                     Page  5  of 11  Pages

owned subsidiary of Yahoo! ("Newco"), and broadcast.com (the "Merger 
Agreement"), providing for the merger (the "Merger") of Newco with and into 
broadcast.com with broadcast.com as the surviving corporation, pursuant to 
which each outstanding Share will be converted into the right to receive 
0.7722 of a share of common stock, par value $0.00017 per share, of Yahoo!.  
The Merger is subject to the approval of the Merger Agreement by 
broadcast.com's stockholders, the expiration of the applicable waiting period 
under the Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended, 
and any other required regulatory approvals, and the satisfaction or waiver 
of certain other conditions as more fully described in the Merger Agreement.  

     As an inducement for Yahoo! to enter into the Merger Agreement and in 
consideration thereof, broadcast.com granted to Yahoo! an option (the 
"Option") to purchase, under certain circumstances described in the Merger 
Agreement, up to 7,333,300 Shares at a purchase price per Share equal to 
$130.02, as adjusted as provided therein (the "Purchase Price").  Based on 
the number of Shares outstanding on March 31, 1999, as represented by 
broadcast.com in the Merger Agreement, the Option would be exercisable for 
approximately 19.9% of the outstanding Shares, or approximately 16.6% of the 
Shares on a fully-diluted basis after giving effect to the exercise of the 
Option.  Yahoo! did not pay additional consideration to broadcast.com in 
connection with broadcast.com granting the Option.  

     None of the Triggering Events (defined in Item 4 below) permitting the 
exercise of the Option has occurred as of the date hereof.  In the event that 
the Option becomes exercisable and Yahoo! wishes to purchase the Shares 
subject thereto, Yahoo! anticipates that it would fund the exercise price 
with working capital.  See also Item 4 below.

     As a further inducement for Yahoo! to enter into the Merger Agreement 
and in consideration thereof, Motorola, Inc., Mark Cuban and Todd Wagner 
(collectively, the "Stockholders"), entered into a voting agreement with 
Yahoo! (the "Voting Agreement"), dated as of March 31, 1999, whereby the 
Stockholders agreed, severally and not jointly, to vote all of the Shares 
beneficially owned by them in favor of approval and adoption of the Merger 
Agreement.  Yahoo! did not pay additional consideration to any Stockholder in 
connection with the execution and delivery of the Voting Agreement.  
References to, and descriptions of, the Merger Agreement and the Voting 
Agreement, respectively, as set forth above in this Item 3, are qualified in 
their entirety by reference to the copies of the Merger Agreement and the 
Voting Agreement, respectively, included as Exhibits 1 and 2 to this Schedule 
13D, and are incorporated in this Item 3 in their entirety where such 
references and descriptions appear.

ITEM 4 - PURPOSE OF TRANSACTION

     (a) - (j)  The information set forth, or incorporated by reference, in 
Item 3 is hereby incorporated herein by reference. 

     Pursuant to the Merger Agreement, broadcast.com has granted Yahoo! the 
Option.  Upon the terms and subject to the conditions set forth in the Merger 
Agreement, Yahoo! may exercise the Option, in whole or in part, at any time 
and from time to time following the occurrence of certain events (each, a 
"Triggering Event").  The Option will expire on the day that is the earlier 

<PAGE>

                                 SCHEDULE 13D

CUSIP No. 111310 10 8                                     Page  6  of 11  Pages

of: (1) the effective date of the Merger, or (2) 270 days after termination 
of the Merger Agreement.

     In general, a Triggering Event may be deemed to have occurred: (1) if 
(a) the Board of Directors of broadcast.com or any committee thereof having 
authority to bind the Board of Directors shall for any reason have withdrawn 
or shall have amended or modified in a manner adverse to Yahoo! its 
recommendation in favor of the adoption and approval of the Merger Agreement 
or the approval of the Merger; (b) broadcast.com shall have failed to include 
in the proxy statement/prospectus the recommendation of the Board of 
Directors of broadcast.com in favor of the adoption and approval of the 
Merger Agreement and the approval of the Merger; (c) the Board of Directors 
of broadcast.com fails to reaffirm its recommendation in favor of the 
adoption and approval of the Merger Agreement and the approval of the Merger 
within 15 business days after Yahoo! requests in writing that such 
recommendation be reaffirmed at any time following the public announcement of 
an Acquisition Proposal (as defined in the Merger Agreement); (d) the Board 
of Directors of broadcast.com or any committee thereof having authority to 
bind the Board of Directors shall have approved or publicly recommended any 
Acquisition Proposal; (e) broadcast.com shall have entered into any letter of 
intent or similar document or any agreement, contract or commitment accepting 
any Acquisition Proposal; (f) a tender or exchange offer relating to 
securities of broadcast.com in excess of 50% of its outstanding voting 
securities shall have been commenced by a person unaffiliated with Yahoo! and 
broadcast.com shall have sent to its stockholders pursuant to Rule 14e-2 
promulgated under the Exchange Act of 1934, as amended (the "Exchange Act"), 
a statement disclosing that broadcast.com recommends acceptance of such 
tender or exchange offer; or (g) broadcast.com shall have intentionally 
breached its obligations under Section 5.4 of the Merger Agreement 
(provisions regarding no solicitation by broadcast.com); or (2) upon 
termination of the Merger Agreement by either Yahoo! or broadcast.com if the 
requisite approval of the Merger Agreement by broadcast.com' stockholders is 
not obtained by reason of the failure to obtain the required vote at a 
meeting of broadcast.com's stockholders duly convened therefor or at any 
adjournment thereof.

     Upon the occurrence of certain events set forth in the Merger Agreement, 
broadcast.com is required to make certain payments to Yahoo! upon the 
surrender of all or a portion of the Option to broadcast.com.  In addition, 
the Merger Agreement grants certain registration rights to Yahoo! with 
respect to the Shares subject to the Option.

     Pursuant to the Voting Agreement, the Stockholders have agreed to vote 
all of the Shares beneficially owned by them in favor of the approval and 
adoption of the Merger Agreement.  The Voting Agreement terminates upon the 
earlier to occur of (1) completion of the Merger, or (2) termination of the 
Merger Agreement.  The name of each Stockholder and the number of outstanding 
shares of broadcast.com Common Stock held by each Stockholder are set forth 
on the signature pages to the Voting Agreement which are incorporated herein 
by reference.  

     The purpose of the Option and the Voting Agreement is to facilitate 
consummation of the Merger.  


<PAGE>

                                 SCHEDULE 13D

CUSIP No. 111310 10 8                                     Page  7  of 11  Pages

     Upon consummation of the Merger as contemplated by the Merger Agreement 
(1) Newco will be merged into broadcast.com, (2) the Board of Directors of 
broadcast.com will be replaced by the Board of Directors of Newco, (3) the 
Certificate of Incorporation and Bylaws of broadcast.com will be replaced by 
the Certificate of Incorporation and Bylaws of Newco, (4) the Shares will 
cease to be authorized for listing on the Nasdaq National Market, and (5) the 
Shares will become eligible for termination of registration pursuant to 
Section 12(g)(4) of the Exchange Act.

     References to, and descriptions of, the Merger Agreement and the Voting 
Agreement as set forth above in this Item 4, are qualified in their entirety 
by reference to the copies of the Merger Agreement and the Voting Agreement 
included as Exhibits 1 and 2, respectively, to this Schedule 13D, and are 
incorporated in this Item 4 in their entirety where such references and 
descriptions appear.

ITEM 5 - INTEREST IN SECURITIES OF THE ISSUER

     (a) - (b)  The number of Shares owned as of the date hereof by Yahoo! is 
159,236, and the number of Shares covered by the Option is 7,333,300.  In 
addition, Yahoo! is the holder of a warrant to purchase 318,472 Shares.  In 
the aggregate, these Shares constitute, based on the number of Shares 
outstanding on March 31, 1999, as represented by broadcast.com in the Merger 
Agreement, approximately (1) 1.3% of broadcast.com Common Stock without 
taking into consideration the exercise of the Option, or (2) 17.6% of 
broadcast.com Common Stock that would be outstanding after giving effect to 
the exercise in full of the Option.

     Prior to the exercise of the Option, Yahoo! (1) is not entitled to any 
rights as a stockholder of broadcast.com as to the Shares covered by the 
Option and (2) disclaims any beneficial ownership of the shares of 
broadcast.com Common Stock which are purchasable by Yahoo! upon exercise of 
the Option because the Option is exercisable only in the limited 
circumstances referred to in Item 4 above, none of which has occurred as of 
the date hereof.  If the Option were exercised, Yahoo! would have the sole 
right to vote and to dispose of the shares of broadcast.com Common Stock 
issued as a result of such exercise, subject to the terms and conditions of 
the Merger Agreement.  See the information in Items 3 and 4 above with 
respect to the Option, which information is incorporated herein by reference. 

     The number of Shares covered by the Voting Agreement is 17,400,272 
(including 494,580 shares subject to options held by Mark Cuban, Todd Wagner 
and Steven Leeke, a Director of broadcast.com and officer of Motorola), which 
constitutes approximately 46.6% of broadcast.com Common Stock, based on the 
number of Shares outstanding on March 31, 1999, as represented by 
broadcast.com in the Merger Agreement.  By virtue of the Voting Agreement, 
Yahoo! may be deemed to share with the respective Stockholders the power to 
vote Shares subject to the Voting Agreement.  However, Yahoo! (1) is not 
entitled to any rights as a stockholder of broadcast.com as to the Shares 
covered by the Voting Agreement and (2) disclaims any beneficial ownership of 
the shares of broadcast.com Common Stock which are covered by the Voting 
Agreement.  See the information in Items 2 and 3 with respect to the 
Stockholders and the information in Items 3 and 4 with respect to the Voting 
Agreement, which information is incorporated herein by reference.  

<PAGE>

                                 SCHEDULE 13D

CUSIP No. 111310 10 8                                     Page  8  of 11  Pages

     (c)  Other than as set forth in this Item 5(a)-(b), to the best of 
Yahoo!'s knowledge as of the date hereof (1) neither Yahoo! nor any 
subsidiary or affiliate of Yahoo! nor any of Yahoo!'s executive officers or 
directors, beneficially owns any shares of broadcast.com Common Stock, and 
(2) there have been no transactions in the shares of broadcast.com Common 
Stock effected during the past 60 days by Yahoo!, nor to the best of Yahoo!'s 
knowledge, by any subsidiary or affiliate of Yahoo! or any of Yahoo!'s 
executive officers or directors. 

     (d)  No other person is known by Yahoo! to have the right to receive or 
the power to direct the receipt of dividends from, or the proceeds from the 
sale of, broadcast.com Common Stock obtainable by Yahoo! upon exercise of the 
Option.

     (e)  Not applicable. 

     Reference to, and descriptions of, the Merger Agreement and the Voting 
Agreement as set forth in this Item 5 are qualified in their entirety by 
reference to the copies of the Merger Agreement and the Voting Agreement, 
respectively, included as Exhibits 1 and 2 to this Schedule 13D, and 
incorporated in this Item 5 in their entirety where such references and 
descriptions appear.

ITEM 6 - CONTRACTS, ARRANGEMENTS, UNDERSTANDINGS OR RELATIONSHIPS WITH 
         RESPECT TO SECURITIES OF THE ISSUER

     The information set forth, or incorporated by reference, in Items 3 
through 5 is hereby incorporated herein by reference.  Copies of the Merger 
Agreement and the Voting Agreement are included as Exhibits 1 and 2, 
respectively, to this Schedule 13D.  To the best of Yahoo!'s knowledge, 
except as described in this Schedule 13D, there are at present no contracts, 
arrangements, understandings or relationships (legal or otherwise) among the 
persons named in Item 2 above and between any such persons and any person 
which respect to any securities of broadcast.com.

ITEM 7 - MATERIAL TO BE FILED AS EXHIBITS

Exhibit   Description

1         Agreement and Plan of Merger dated as of March 31, 1999, by and 
          among Yahoo! Inc., Alamo Acquisition Corp., and broadcast.com inc. 
          (without exhibits).

2         Voting Agreement dated as of March 31, 1999, by and among Yahoo! 
          Inc., Motorola, Inc., Mark Cuban, and Todd R. Wagner.

<PAGE>

                                 SCHEDULE 13D

CUSIP No. 111310 10 8                                     Page  9  of 11  Pages

SIGNATURE

     After reasonable inquiry and to the best of my knowledge and belief, I 
certify that the information set forth in this statement is true, complete 
and correct.

Date: April 9, 1999                          /s/ Gary Valenzuela
                                             ----------------------------------
                                             Gary Valenzuela
                                             Senior Vice President, Finance 
                                             and Administration, and Chief 
                                             Financial Officer

<PAGE>

                                 SCHEDULE 13D

CUSIP No. 111310 10 8                                     Page  10  of 11  Pages

                                   SCHEDULE I

                       DIRECTORS AND EXECUTIVE OFFICERS
                                 OF YAHOO! INC.

     The following table sets forth the name, business address and present 
principal occupation or employment of each director and executive officer of 
Yahoo!.  Except as indicated below, each such person is a U.S. citizen, and 
the business address of each such person is 3420 Central Expressway, Santa 
Clara, California 95051.

                                BOARD OF DIRECTORS

<TABLE>
<CAPTION>
Name and Title                Present Principal Occupation
- --------------                ----------------------------
<S>                           <C>
Timothy Koogle,               Chief Executive Officer and Chairman of the Board, Yahoo! Inc.
Chairman of the Board

Eric Hippeau,                 Chairman and Chief Executive Officer of Ziff-Davis, Inc.  The   
Director                      address of Ziff-Davis is One Park Avenue, New York, New York    
                              10016

Arthur H. Kern,               Chairman and Chief Executive Officer of American Media.
Director

Jeff Mallett,                 President and Chief Operating Officer, Yahoo! Inc.
Director

Michael Moritz,               General Partner, Sequoia Capital.  The address of Sequoia Capital  
Director                      is 3000 Sand Hill Road, Building 4, Suite 280, Menlo Park,         
                              California 94025                                                   

Jerry Yang,                   Chief Yahoo, Yahoo! Inc.
Director

                    EXECUTIVE OFFICERS WHO ARE NOT DIRECTORS

Name and Title                Title and Present Principal Occupation
- --------------                --------------------------------------

David Filo                    Chief Yahoo, Yahoo! Inc.


Farzad Nazem                  Senior Vice President, Product Development and Operations, and 
                              Chief Technology Officer, Yahoo! Inc.
</TABLE>


<PAGE>

                                 SCHEDULE 13D

CUSIP No. 111310 10 8                                     Page  11  of 11  Pages

<TABLE>
<S>                           <C>
James J. Nelson               Vice President, Finance, Yahoo! Inc.

John Place                    Vice President, General Counsel and Secretary, Yahoo! Inc.

Anil Singh                    Senior Vice President, Sales, Yahoo! Inc.

Gary Valenzuela               Senior Vice President, Finance and Administration, and Chief 
                              Financial Officer, Yahoo! Inc.
</TABLE>


<PAGE>
                          AGREEMENT AND PLAN OF MERGER
                                  BY AND AMONG
                                  YAHOO! INC.
                            ALAMO ACQUISITION CORP.
                                      AND
                               BROADCAST.COM INC.
                           DATED AS OF MARCH 31, 1999
<PAGE>
                               TABLE OF CONTENTS
 
<TABLE>
<CAPTION>
                                                                                                                  PAGE
                                                                                                                  -----
<C>        <S>                                                                                                 <C>
ARTICLE I  THE MERGER.....................................................................................              1
     1.1   The Merger........................................................................................           1
     1.2   Effective Time; Closing...........................................................................           2
     1.3   Effect of the Merger..............................................................................           2
     1.4   Certificate of Incorporation......................................................................           2
     1.5   Directors and Officers............................................................................           2
     1.6   Effect on Capital Stock...........................................................................           2
     1.7   Surrender of Certificates.........................................................................           3
     1.8   No Further Ownership Rights in Broadcast.com Common Stock.........................................           4
     1.9   Lost, Stolen or Destroyed Certificates............................................................           4
     1.10  Tax and Accounting Consequences...................................................................           4
     1.11  Taking of Necessary Action; Further Action........................................................           5
 
ARTICLE II  REPRESENTATIONS AND WARRANTIES OF COMPANY.....................................................              5
     2.1   Organization of Broadcast.com.....................................................................           5
     2.2   Broadcast.com Capital Structure...................................................................           5
     2.3   Obligations With Respect to Capital Stock.........................................................           6
     2.4   Authority.........................................................................................           6
     2.5   SEC Filings; Broadcast.com Financial Statements...................................................           7
     2.6   Absence of Certain Changes or Events..............................................................           8
     2.7   Taxes.............................................................................................           9
     2.8   Title to Properties; Absence of Liens and Encumbrances............................................          10
     2.9   Intellectual Property.............................................................................          10
     2.10  Compliance; Permits; Restrictions.................................................................          12
     2.11  Litigation........................................................................................          13
     2.12  Employee Benefit Plans............................................................................          13
     2.13  Environmental Matters.............................................................................          16
     2.14  Agreements, Contracts and Commitments.............................................................          16
     2.15  Pooling of Interests..............................................................................          17
     2.16  Change of Control Payments........................................................................          17
     2.17  Statements; Proxy Statement/Prospectus............................................................          17
     2.18  Board Approval....................................................................................          18
     2.19  Brokers' and Finders' Fees........................................................................          18
     2.20  Fairness Opinion..................................................................................          18
     2.21  Affiliates........................................................................................          18
     2.22  Section 203 Not Applicable........................................................................          18
 
ARTICLE III  REPRESENTATIONS AND WARRANTIES OF YAHOO! AND MERGER SUB......................................
                                                                                                                       18
     3.1   Organization of Yahoo! and Merger Sub.............................................................          18
     3.2   Yahoo! and Merger Sub Capital Structure...........................................................          19
     3.3   Authority.........................................................................................          19
     3.4   SEC Filings; Yahoo! Financial Statements..........................................................          20
     3.5   Absence of Certain Changes or Events..............................................................          20
     3.6   Proxy Statement/Prospectus........................................................................          20
     3.7   Litigation........................................................................................          21
     3.8   Pooling of Interests..............................................................................          21
     3.9   Affiliates........................................................................................          21
     3.10  Valid Issuance....................................................................................          21
</TABLE>
 
                                       i
<PAGE>
<TABLE>
<CAPTION>
                                                                                                                  PAGE
                                                                                                                  -----
<C>        <S>                                                                                                 <C>
ARTICLE IV  CONDUCT PRIOR TO THE EFFECTIVE TIME...........................................................             21
     4.1   Conduct of Business by Broadcast.com..............................................................          21
     4.2   Conduct of Business by Yahoo!.....................................................................          23
 
ARTICLE V  ADDITIONAL AGREEMENTS..........................................................................             23
     5.1   Proxy Statement/Prospectus; Registration Statement; Other Filings.................................          23
     5.2   Meeting of Broadcast.com Stockholders.............................................................          24
     5.3   Confidentiality: Access to Information............................................................          25
     5.4   No Solicitation...................................................................................          25
     5.5   Public Disclosure.................................................................................          27
     5.6   Reasonable Efforts; Notification..................................................................          27
     5.7   Third Party Consents..............................................................................          28
     5.8   Stock Options and ESPP............................................................................          28
     5.9   Form S-8..........................................................................................          28
     5.10  Indemnification...................................................................................          29
     5.11  Nasdaq Listing....................................................................................          29
     5.12  Affiliate Agreements..............................................................................          29
     5.13  Company Stock Option..............................................................................          29
     5.14  Letter of Broadcast.com's Accountants.............................................................          32
 
ARTICLE VI  CONDITIONS TO THE MERGER......................................................................             32
     6.1   Conditions to Obligations of Each Party to Effect the Merger......................................          32
     6.2   Additional Conditions to Obligations of Broadcast.com.............................................          33
     6.3   Additional Conditions to the Obligations of Yahoo! and Merger Sub.................................          34
 
ARTICLE VII  TERMINATION, AMENDMENT AND WAIVER............................................................             34
     7.1   Termination.......................................................................................          34
     7.2   Notice of Termination Effect of Termination.......................................................          36
     7.3   Fees and Expenses.................................................................................          36
     7.4   Amendment.........................................................................................          37
     7.5   Extension; Waiver.................................................................................          37
 
ARTICLE VIII  GENERAL PROVISIONS..........................................................................             37
     8.1   Non-Survival of Representations and Warranties....................................................          37
     8.2   Notices...........................................................................................          37
     8.3   Interpretation; Certain Defined Terms.............................................................          38
     8.4   Counterparts......................................................................................          39
     8.5   Entire Agreement; Third Party Beneficiaries.......................................................          39
     8.6   Severability......................................................................................          39
     8.7   Other Remedies; Specific Performance..............................................................          39
     8.8   Governing Law.....................................................................................          39
     8.9   Rules of Construction.............................................................................          39
     8.10  Assignment........................................................................................          40
     8.11  Waiver of Jury Trial..............................................................................          40
</TABLE>
 
                                       ii
<PAGE>
                               INDEX OF EXHIBITS
 
<TABLE>
<S>        <C>
Exhibit A  Form of Broadcast.com Voting Agreement
 
Exhibit B  Form of Broadcast.com Affiliate Agreement
 
Exhibit C  Form of Noncompetition Agreement
 
Exhibit D  Form of Yahoo! Affiliate Agreement
</TABLE>
 
                                      iii
<PAGE>
                          AGREEMENT AND PLAN OF MERGER
 
    This AGREEMENT AND PLAN OF MERGER is made and entered into as of March 31,
1999 (this "AGREEMENT"), among Yahoo! Inc., a California corporation ("YAHOO!"),
Alamo Acquisition Corp., a Delaware corporation and a wholly owned subsidiary of
Yahoo! ("MERGER SUB"), and broadcast.com inc., a Delaware corporation
("BROADCAST.COM").
 
                                    RECITALS
 
    A. Upon the terms and subject to the conditions of this Agreement and in
accordance with the Delaware General Corporation Law ("DELAWARE LAW"), Yahoo!,
Merger Sub and broadcast.com intend to enter into a business combination
transaction.
 
    B.  The Board of Directors of broadcast.com (i) has determined that the
Merger (as defined in Section 1.1) is consistent with and in furtherance of the
long-term business strategy of broadcast.com and advisable and fair to, and in
the best interests of, broadcast.com and its stockholders, (ii) has approved
this Agreement, the Merger and the other transactions contemplated by this
Agreement and (iii) has determined to recommend that the stockholders of
broadcast.com adopt and approve this Agreement and approve the Merger.
 
    C.  The Board of Directors of Yahoo! (i) has determined that the Merger is
consistent with and in furtherance of the long-term business strategy of Yahoo!
and advisable and fair to, and in the best interests of, Yahoo! and its
shareholders and (ii) has approved this Agreement, the Merger and the other
transactions contemplated by this Agreement.
 
    D. Concurrently with the execution of this Agreement, and as a condition and
inducement to Yahoo!'s willingness to enter into this Agreement, certain
stockholders of broadcast.com are entering into Voting Agreements in
substantially the form attached hereto as EXHIBIT A (the "BROADCAST.COM VOTING
AGREEMENTS") and certain persons or entities who may be deemed to be affiliates
of broadcast.com are entering into Affiliate Agreements in substantially the
form attached hereto as EXHIBIT B (the "BROADCAST.COM AFFILIATE AGREEMENTS").
 
    E.  In addition, concurrently with the execution of this Agreement, and as a
condition and inducement to Yahoo!'s willingness to enter into this Agreement,
Mark Cuban and Todd R. Wagner are entering into Noncompetition Agreements in
substantially the form attached hereto as EXHIBIT C (the "NONCOMPETITION
AGREEMENTS").
 
    F.  The parties intend, by executing this Agreement, to adopt a plan of
reorganization within the meaning of Section 368 of the Internal Revenue Code of
1986, as amended (the "CODE").
 
    G. It is also intended by the parties hereto that the Merger shall qualify
for accounting treatment as a pooling of interests.
 
    NOW, THEREFORE, in consideration of the covenants, agreements,
representations and warranties set forth herein, the parties agree as follows:
 
                                   ARTICLE I
                                   THE MERGER
 
    1.1  THE MERGER.  At the Effective Time and subject to and upon the terms
and conditions of this Agreement and the applicable provisions of Delaware Law,
Merger Sub shall be merged with and into broadcast.com (the "MERGER"), the
separate corporate existence of Merger Sub shall cease and broadcast.com shall
continue as the surviving corporation. Broadcast.com as the surviving
corporation after the Merger is hereinafter sometimes referred to as the
"SURVIVING CORPORATION."
 
                                       1
<PAGE>
    1.2  EFFECTIVE TIME; CLOSING.  Subject to the provisions of this Agreement,
the parties hereto shall cause the Merger to be consummated by filing a
certificate of merger, in such appropriate form as determined by the parties,
with the Secretary of State of the State of Delaware in accordance with the
relevant provisions of Delaware Law (the "CERTIFICATE OF MERGER") (the time of
such filing (or such later time as may be agreed in writing by broadcast.com and
Yahoo! and specified in the Certificate of Merger) being the "EFFECTIVE TIME")
as soon as practicable on or after the Closing Date (as herein defined). The
closing of the Merger (the "CLOSING") shall take place at the offices of Venture
Law Group, 2800 Sand Hill Road, Menlo Park, California, at a time and date to be
specified by the parties, which shall be no later than the second business day
after the satisfaction or waiver of the conditions set forth in Article VI, or
at such other time, date and location as the parties hereto agree in writing
(the "CLOSING DATE").
 
    1.3  EFFECT OF THE MERGER.  At the Effective Time, the effect of the Merger
shall be as provided in this Agreement and the applicable provisions of Delaware
Law. Without limiting the generality of the foregoing, at the Effective Time all
the property, rights, privileges, powers and franchises of broadcast.com and
Merger Sub shall vest in the Surviving Corporation, and all debts, liabilities
and duties of broadcast.com and Merger Sub shall become the debts, liabilities
and duties of the Surviving Corporation.
 
    1.4  CERTIFICATE OF INCORPORATION; BYLAWS.
 
    (a) At the Effective Time, the Certificate of Incorporation of Merger Sub,
as in effect immediately prior to the Effective Time, shall be the Certificate
of Incorporation of the Surviving Corporation until thereafter amended as
provided by law and such Certificate of Incorporation of the Surviving
Corporation; PROVIDED, HOWEVER, that at the Effective Time Article I of the
Certificate of Incorporation of the Surviving Corporation shall be amended to
read: "The name of the corporation is broadcast.com inc."
 
    (b) At the Effective Time, the Bylaws of Merger Sub, as in effect
immediately prior to the Effective Time, shall be the Bylaws of the Surviving
Corporation until thereafter amended.
 
    1.5  DIRECTORS AND OFFICERS.  The initial directors of the Surviving
Corporation shall be the directors of Merger Sub immediately prior to the
Effective Time, until their respective successors are duly elected or appointed
and qualified. The initial corporate officers of the Surviving Corporation shall
be the corporate officers of Merger Sub immediately prior to the Effective Time,
until their respective successors are duly appointed.
 
    1.6  EFFECT ON CAPITAL STOCK.  At the Effective Time, by virtue of the
Merger and without any action on the part of Merger Sub, broadcast.com or the
holders of any of the following securities:
 
        (a)  CONVERSION OF BROADCAST.COM COMMON STOCK.  Each share of common
    stock, par value $0.01 per share, of broadcast.com ("BROADCAST.COM COMMON
    STOCK") issued and outstanding immediately prior to the Effective Time,
    other than any shares of broadcast.com Common Stock to be canceled pursuant
    to Section 1.6(b), will be canceled and extinguished and automatically
    converted (subject to Sections 1.6(d) and (e)) into the right to receive
    0.7722 of a share (the "EXCHANGE RATIO") of common stock, par value $0.00017
    per share, of Yahoo! ("YAHOO! COMMON STOCK") upon surrender of the
    certificate representing such share of broadcast.com Common Stock in the
    manner provided in Section 1.7.
 
        (b)  CANCELLATION OF BROADCAST.COM-OWNED AND YAHOO!-OWNED STOCK.  Each
    share of broadcast.com Common Stock held by broadcast.com or owned by Merger
    Sub, Yahoo! or any direct or indirect wholly owned subsidiary of
    broadcast.com or of Yahoo! immediately prior to the Effective Time shall be
    canceled and extinguished without any conversion thereof.
 
        (c)  CAPITAL STOCK OF MERGER SUB.  Each share of common stock, $0.0l par
    value per share, of Merger Sub issued and outstanding immediately prior to
    the Effective Time shall be converted into one validly issued, fully paid
    and nonassessable share of common stock, $0.01 par value per share, of
 
                                       2
<PAGE>
    the Surviving Corporation. Each certificate evidencing ownership of shares
    of the common stock of Merger Sub shall evidence ownership of such shares of
    capital stock of the Surviving Corporation.
 
        (d)  ADJUSTMENTS TO EXCHANGE RATIO.  The Exchange Ratio shall be
    adjusted to reflect appropriately the effect of any stock split, reverse
    stock split, stock dividend (including any dividend or distribution of
    securities convertible into Yahoo! Common Stock or broadcast.com Common
    Stock), reorganization, recapitalization, reclassification or other like
    change with respect to Yahoo! Common Stock or broadcast.com Common Stock
    occurring on or after the date hereof and prior to the Effective Time.
 
        (e)  FRACTIONAL SHARES.  No fraction of a share of Yahoo! Common Stock
    will be issued by virtue of the Merger, but in lieu thereof each holder of
    shares of broadcast.com Common Stock who would otherwise be entitled to a
    fraction of a share of Yahoo! Common Stock (after aggregating all fractional
    shares of Yahoo! Common Stock that otherwise would be received by such
    holder) shall receive from Yahoo! an amount of cash (rounded to the nearest
    whole cent) equal to the product of (i) such fraction, multiplied by (ii)
    the average closing sale price of one share of Yahoo! Common Stock for the
    five (5) most recent days that Yahoo! Common Stock has traded ending on the
    trading day immediately prior to the Effective Time, as reported on the
    Nasdaq Stock Market.
 
    1.7  SURRENDER OF CERTIFICATES.
 
    (a)  EXCHANGE AGENT.  Yahoo! shall select a bank or trust company reasonably
acceptable to broadcast.com to act as the exchange agent (the "EXCHANGE AGENT")
in the Merger.
 
    (b)  YAHOO! TO PROVIDE COMMON STOCK.  Promptly after the Effective Time,
Yahoo! shall make available to the Exchange Agent for exchange in accordance
with this Article I, the shares of Yahoo! Common Stock issuable pursuant to
Section 1.6 in exchange for outstanding shares of broadcast.com Common Stock,
and cash in an amount sufficient for payment in lieu of fractional shares
pursuant to Section 1.6(e) and any dividends or distributions to which holders
of shares of broadcast.com Common Stock may be entitled pursuant to Section
1.7(d).
 
    (c)  EXCHANGE PROCEDURES.  Promptly after the Effective Time, Yahoo! shall
cause the Exchange Agent to mail to each holder of record (as of the Effective
Time) of a certificate or certificates (the "CERTIFICATES"), which immediately
prior to the Effective Time represented outstanding shares of broadcast.com
Common Stock, whose shares were converted into shares of Yahoo! Common Stock
pursuant to Section 1.6 (i) a letter of transmittal in customary form (which
shall specify that delivery shall be effected, and risk of loss and title to the
Certificates shall pass, only upon delivery of the Certificates to the Exchange
Agent and shall contain such other customary provisions as Yahoo! may reasonably
specify) and (ii) instructions for use in effecting the surrender of the
Certificates in exchange for certificates representing shares of Yahoo! Common
Stock, cash in lieu of any fractional shares pursuant to Section 1.6(e) and any
dividends or other distributions pursuant to Section 1.7(d). Upon surrender of
Certificates for cancellation to the Exchange Agent or to such other agent or
agents as may be appointed by Yahoo!, together with such letter of transmittal,
duly completed and validly executed in accordance with the instructions thereto,
the holders of such Certificates shall be entitled to receive in exchange
therefor certificates representing the number of whole shares of Yahoo! Common
Stock into which their shares of broadcast.com Common Stock were converted at
the Effective Time, payment in lieu of fractional shares which such holders have
the right to receive pursuant to Section 1.6(e) and any dividends or
distributions payable pursuant to Section 1.7(d), and the Certificates so
surrendered shall forthwith be canceled. Until so surrendered, outstanding
Certificates will be deemed from and after the Effective Time, for all corporate
purposes, to evidence only the ownership of the number of full shares of Yahoo!
Common Stock into which such shares of broadcast.com Common Stock shall have
been so converted and the right to receive an amount in cash in lieu of the
issuance of any fractional shares in accordance with Section 1.6(e) and any
dividends or distributions payable pursuant to Section 1.7(d).
 
                                       3
<PAGE>
    (d)  DISTRIBUTIONS WITH RESPECT TO UNEXCHANGED SHARES.  No dividends or
other distributions declared or made after the date of this Agreement with
respect to Yahoo! Common Stock with a record date after the Effective Time will
be paid to the holders of any unsurrendered Certificates with respect to the
shares of Yahoo! Common Stock represented thereby until the holders of record of
such Certificates shall surrender such Certificates. Subject to applicable law,
following surrender of any such Certificates, the Exchange Agent shall deliver
to the record holders thereof, without interest, certificates representing whole
shares of Yahoo! Common Stock issued in exchange therefor along with payment in
lieu of fractional shares pursuant to Section 1.6(e) hereof and the amount of
any such dividends or other distributions with a record date after the Effective
Time payable with respect to such shares of Yahoo! Common Stock.
 
    (e)  TRANSFERS OF OWNERSHIP.  If certificates representing shares of Yahoo!
Common Stock are to be issued in a name other than that in which the
Certificates surrendered in exchange therefor are registered, it will be a
condition of the issuance thereof that the Certificates so surrendered will be
properly endorsed and otherwise in proper form for transfer and that the persons
requesting such exchange will have paid to Yahoo! or any agent designated by it
any transfer or other taxes required by reason of the issuance of certificates
representing shares of Yahoo! Common Stock in any name other than that of the
registered holder of the Certificates surrendered, or established to the
satisfaction of Yahoo! or any agent designated by it that such tax has been paid
or is not payable.
 
    (f)  NO LIABILITY.  Notwithstanding anything to the contrary in this Section
1.7, neither the Exchange Agent, Yahoo!, the Surviving Corporation nor any party
hereto shall be liable to a holder of shares of Yahoo! Common Stock or
broadcast.com Common Stock for any amount properly paid to a public official
pursuant to any applicable abandoned property, escheat or similar law.
 
    1.8  NO FURTHER OWNERSHIP RIGHTS IN BROADCAST.COM COMMON STOCK.  All shares
of Yahoo! Common Stock issued in accordance with the terms hereof (including any
cash paid in respect thereof pursuant to Section 1.6(e) and 1.7(d)) shall be
deemed to have been issued in full satisfaction of all rights pertaining to such
shares of broadcast.com Common Stock, and there shall be no further registration
of transfers on the records of the Surviving Corporation of shares of
broadcast.com Common Stock which were outstanding immediately prior to the
Effective Time. If after the Effective Time Certificates are presented to the
Surviving Corporation for any reason, they shall be canceled and exchanged as
provided in this Article I.
 
    1.9  LOST, STOLEN OR DESTROYED CERTIFICATES.  In the event that any
Certificates shall have been lost, stolen or destroyed, the Exchange Agent shall
issue in exchange for such lost, stolen or destroyed Certificates, upon the
making of an affidavit of that fact by the holder thereof, certificates
representing the shares of Yahoo! Common Stock into which the shares of
broadcast.com Common Stock represented by such Certificates were converted
pursuant to Section 1.6, cash for fractional shares, if any, as may be required
pursuant to Section 1.6(e) and any dividends or distributions payable pursuant
to Section 1.7(d); PROVIDED, HOWEVER, that Yahoo! may, in its discretion and as
a condition precedent to the issuance of such certificates representing shares
of Yahoo! Common Stock, cash and other distributions, require the owner of such
lost, stolen or destroyed Certificates to deliver a bond in such sum and with
customary provisions as it may reasonably direct as indemnity against any claim
that may be made against Yahoo!, the Surviving Corporation or the Exchange Agent
with respect to the Certificates alleged to have been lost, stolen or destroyed.
 
    1.10  TAX AND ACCOUNTING CONSEQUENCES.
 
    (a) It is intended by the parties hereto that the Merger shall constitute a
reorganization within the meaning of Section 368 of the Code. The parties hereto
adopt this Agreement as a "plan of reorganization" within the meaning of
Sections 1.368-2(g) and 1.368-3(a) of the United States Income Tax Regulations.
 
                                       4
<PAGE>
    (b) It is intended by the parties hereto that the Merger shall qualify for
accounting treatment as a pooling of interests.
 
    1.11  TAKING OF NECESSARY ACTION; FURTHER ACTION.  If, at any time after the
Effective Time, any further action is necessary or desirable to carry out the
purposes of this Agreement and to vest the Surviving Corporation with full
right, title and possession to all assets, property, rights, privileges, powers
and franchises of broadcast.com and Merger Sub, the officers and directors of
broadcast.com and Merger Sub will take all such lawful and necessary action.
Yahoo! shall cause Merger Sub to perform all of its obligations relating to this
Agreement and the transactions contemplated hereby.
 
                                   ARTICLE II
                   REPRESENTATIONS AND WARRANTIES OF COMPANY
 
    Broadcast.com represents and warrants to Yahoo! and Merger Sub, subject to
the exceptions specifically disclosed in writing in the disclosure letter
delivered by broadcast.com to Yahoo! dated as of the date hereof and certified
by a duly authorized officer of broadcast.com (the "BROADCAST.COM DISCLOSURE
LETTER"), as follows:
 
    2.1  ORGANIZATION OF BROADCAST.COM.
 
    (a) Broadcast.com and each of its subsidiaries (i) is a corporation or other
legal entity duly organized, validly existing and in good standing under the
laws of the jurisdiction in which it is organized; (ii) has the corporate or
other power and authority to own, lease and operate its assets and property and
to carry on its business as now being conducted; and (iii) except as would not
be material to broadcast.com, is duly qualified or licensed to do business in
each jurisdiction where the character of the properties owned, leased or
operated by it or the nature of its activities makes such qualification or
licensing necessary.
 
    (b) Broadcast.com has delivered to Yahoo! a true and complete list of all of
broadcast.com's subsidiaries as of the date of this Agreement, indicating the
jurisdiction of organization of each subsidiary and broadcast.com's equity
interest therein. Except as set forth on such list, neither broadcast.com nor
any of its subsidiaries owns any equity interest in any corporation, partnership
or joint venture arrangement or other business entity that is material to
broadcast.com.
 
    (c) Broadcast.com has delivered or made available to Yahoo! a true and
correct copy of the Certificate of Incorporation and Bylaws of broadcast.com and
similar governing instruments of each of its subsidiaries, each as amended to
date, and each such instrument is in full force and effect. Neither
broadcast.com nor any of its subsidiaries is in violation of any of the
provisions of its Certificate of Incorporation or Bylaws or equivalent governing
instruments.
 
    2.2  BROADCAST.COM CAPITAL STRUCTURE.  The authorized capital stock of
broadcast.com consists of 60,000,000 shares of Common Stock, par value $0.01 per
share, of which there were 36,851,149 shares issued and outstanding as of March
31, 1999 (none of which were held by broadcast.com in its treasury), and
5,000,000 shares of Preferred Stock, par value $0.01 per share, none of which
are issued or outstanding. All outstanding shares of broadcast.com Common Stock
are duly authorized, validly issued, fully paid and nonassessable and are not
subject to preemptive rights created by statute, the Certificate of
Incorporation or Bylaws of broadcast.com or any agreement or document to which
broadcast.com is a party or by which it is bound. As of March 31, 1999,
broadcast.com had reserved an aggregate of (i) 5,187,296 shares of broadcast.com
Common Stock for issuance pursuant to broadcast.com's 1998 Stock Option Plan,
(ii) 2,438,074 shares of broadcast.com Common Stock for issuance pursuant to
broadcast.com's 1996 Stock Option Plan, and (iii) 277,500 shares of
broadcast.com Common Stock for issuance pursuant to broadcast.com's 1996
Non-Employee Directors Stock Option Plan. As of March 31, 1999, there were
options outstanding to purchase an aggregate of (u) 5,121,108 shares of
broadcast.com Common Stock pursuant to broadcast.com's 1998 Stock Option Plan,
(v) 1,834,600 shares of broadcast.com Common Stock pursuant to broadcast.com's
1996 Stock Option Plan, and (w) 57,300 shares of
 
                                       5
<PAGE>
broadcast.com Common Stock pursuant to broadcast.com's 1996 Non-Employee
Directors Stock Option Plan. Broadcast.com's 1998 Stock Option Plan,
broadcast.com's 1996 Stock Option Plan and broadcast.com's 1996 Non-Employee
Directors Stock Option Plan are collectively referred to in this Agreement as
the "BROADCAST.COM STOCK OPTION PLANS." There are warrants outstanding to
purchase 436,192 shares of broadcast.com Common Stock. As of March 31, 1999,
broadcast.com had reserved an aggregate of 494,849 shares of broadcast.com
Common Stock for issuance pursuant to broadcast.com's 1998 Employee Stock
Purchase Plan (the "ESPP"). All shares of broadcast.com Common Stock subject to
issuance as aforesaid, upon issuance on the terms and conditions specified in
the instruments pursuant to which they are issuable, would be duly authorized,
validly issued, fully paid and nonassessable. The broadcast.com Disclosure
Letter lists for each person who held options or warrants to acquire shares of
broadcast.com Common Stock as of March 31, 1999, the name of the holder of such
option or warrant, the exercise price of such option or warrant, the number of
shares as to which such option or warrant had vested at such date, the vesting
schedule for such option or warrant and whether the exercisability of such
option or warrant will be accelerated in any way by the transactions
contemplated by this Agreement, and indicates the extent of acceleration, if
any.
 
    2.3  OBLIGATIONS WITH RESPECT TO CAPITAL STOCK.  Except as set forth in
Section 2.2, there are no equity securities, partnership interests or similar
ownership interests of any class of broadcast.com equity security, or any
securities exchangeable or convertible into or exercisable for such equity
securities, partnership interests or similar ownership interests, issued,
reserved for issuance or outstanding. Except for securities broadcast.com owns
free and clear of all claims and encumbrances, directly or indirectly through
one or more subsidiaries, there are no equity securities, partnership interests
or similar ownership interests of any class of equity security of any subsidiary
of broadcast.com, or any security exchangeable or convertible into or
exercisable for such equity securities, partnership interests or similar
ownership interests, issued, reserved for issuance or outstanding. Except as set
forth in Section 2.2, there are no subscriptions, options, warrants, equity
securities, partnership interests or similar ownership interests, calls, rights
(including preemptive rights), commitments or agreements of any character to
which broadcast.com or any of its subsidiaries is a party or by which it is
bound obligating broadcast.com or any of its subsidiaries to issue, deliver or
sell, or cause to be issued, delivered or sold, or repurchase, redeem or
otherwise acquire, or cause the repurchase, redemption or acquisition of, any
shares of capital stock, partnership interests or similar ownership interests of
broadcast.com or any of its subsidiaries or obligating broadcast.com or any of
its subsidiaries to grant, extend, accelerate the vesting of or enter into any
such subscription, option, warrant, equity security, call, right, commitment or
agreement. Except as contemplated by this Agreement, there are no registration
rights and there is no voting trust, proxy, rights plan, antitakeover plan or
other agreement or understanding to which broadcast.com is a party or by which
it is bound with respect to any equity security of any class of broadcast.com or
with respect to any equity security, partnership interest or similar ownership
interest of any class of any of its subsidiaries. Stockholders of broadcast.com
will not be entitled to dissenters' rights under applicable state law in
connection with the Merger.
 
    2.4  AUTHORITY.
 
    (a) Broadcast.com has all requisite corporate power and authority to enter
into this Agreement and to consummate the transactions contemplated hereby. The
execution and delivery of this Agreement and the consummation of the
transactions contemplated hereby have been duly authorized by all necessary
corporate action on the part of broadcast.com, subject only to the approval and
adoption of this Agreement and the approval of the Merger by broadcast.com's
stockholders and the filing of the Certificate of Merger pursuant to Delaware
Law. A vote of the holders of a majority of the outstanding shares of
broadcast.com Common Stock is sufficient for broadcast.com's stockholders to
approve and adopt this Agreement and approve the Merger. This Agreement has been
duly executed and delivered by broadcast.com and, assuming the due execution and
delivery by Yahoo! and Merger Sub, constitutes a valid and binding obligation of
broadcast.com, enforceable against broadcast.com in accordance with its terms,
except as enforceability may be limited by bankruptcy and other similar laws and
general principles of
 
                                       6
<PAGE>
equity. The execution and delivery of this Agreement by broadcast.com does not,
and the performance of this Agreement by broadcast.com will not, (i) conflict
with or violate the Certificate of Incorporation or Bylaws of broadcast.com or
the equivalent organizational documents of any of its subsidiaries, (ii) subject
to obtaining the approval and adoption of this Agreement and the approval of the
Merger by broadcast.com's stockholders as contemplated in Section 5.2 and
compliance with the requirements set forth in Section 2.4(b) below, conflict
with or violate any law, rule, regulation, order, judgment or decree applicable
to broadcast.com or any of its subsidiaries or by which broadcast.com or any of
its subsidiaries or any of their respective properties is bound or affected, or
(iii) result in any material breach of or constitute a material default (or an
event that with notice or lapse of time or both would become a material default)
under, or impair broadcast.com's rights or alter the rights or obligations of
any third party under, or give to others any rights of termination, amendment,
acceleration or cancellation of, or result in the creation of a material lien or
encumbrance on any of the material properties or assets of broadcast.com or any
of its subsidiaries pursuant to, any note, bond, mortgage, indenture, contract,
agreement, lease, license, permit, franchise, concession, or other instrument or
obligation, in each case that is material to broadcast.com, to which
broadcast.com or any of its subsidiaries is a party or by which broadcast.com or
any of its subsidiaries or its or any of their respective assets are bound or
affected. The broadcast.com Disclosure Letter lists all consents, waivers and
approvals under any of broadcast.com's or any of its subsidiaries' agreements,
contracts, licenses or leases required to be obtained in connection with the
consummation of the transactions contemplated hereby, which, if individually or
in the aggregate not obtained, would result in a loss of benefits to
broadcast.com, Yahoo! or the Surviving Corporation as a result of the Merger
that would be reasonably likely to result in a Material Adverse Effect (as
defined in Section 8.3(c)) with respect to broadcast.com, Yahoo! or the
Surviving Corporation.
 
    (b) No consent, approval, order or authorization of, or registration,
declaration or filing with any court, administrative agency or commission or
other governmental authority or instrumentality, foreign or domestic
("GOVERNMENTAL ENTITY"), is required to be obtained or made by broadcast.com in
connection with the execution and delivery of this Agreement or the consummation
of the Merger, except for (i) the filing of the Certificate of Merger with the
Secretary of State of the State of Delaware, (ii) the filing of the Proxy
Statement/Prospectus (as defined in Section 2.17) with the Securities and
Exchange Commission ("SEC"), (iii) such consents, approvals, orders,
authorizations, registrations, declarations and filings as may be required under
applicable federal, foreign and state securities (or related) laws and the
Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended (the "HSR
ACT"), and (iv) such other consents, authorizations, filings, approvals and
registrations which if not obtained or made would not be material to
broadcast.com or Yahoo! or have a material adverse effect on the ability of the
parties hereto to consummate the Merger.
 
    2.5  SEC FILINGS; BROADCAST.COM FINANCIAL STATEMENTS.
 
    (a) Broadcast.com has filed all forms, reports and documents required to be
filed by broadcast.com with the SEC since July 16, 1998, and has made available
to Yahoo! such forms, reports and documents in the form filed with the SEC. All
such required forms, reports and documents (including those that broadcast.com
may file subsequent to the date hereof) are referred to herein as the
"BROADCAST.COM SEC REPORTS." As of their respective dates, the broadcast.com SEC
Reports (i) were prepared in accordance with the requirements of the Securities
Act of 1933, as amended (the "SECURITIES ACT"), or the Securities Exchange Act
of 1934, as amended (the "EXCHANGE ACT"), as the case may be, and the rules and
regulations of the SEC thereunder applicable to such broadcast.com SEC Reports
and (ii) did not at the time they were filed (or if amended or superseded by a
filing prior to the date of this Agreement, then on the date of such filing)
contain any untrue statement of a material fact or omit to state a material fact
required to be stated therein or necessary in order to make the statements
therein, in the light of the circumstances under which they were made, not
misleading. None of broadcast.com's subsidiaries is required to file any forms,
reports or other documents with the SEC.
 
                                       7
<PAGE>
    (b) Each of the consolidated financial statements (including, in each case,
any related notes thereto) contained in the broadcast.com SEC Reports (the
"BROADCAST.COM FINANCIALS"), including each broadcast.com SEC Reports filed
after the date hereof until the Closing, (i) complied as to form in all material
respects with the published rules and regulations of the SEC with respect
thereto, (ii) was prepared in accordance with United States generally accepted
accounting principles ("GAAP") applied on a consistent basis throughout the
periods involved (except as may be indicated in the notes thereto or, in the
case of unaudited interim financial statements, as may be permitted by the SEC
on Form 10-Q under the Exchange Act) and (iii) fairly presented the consolidated
financial position of broadcast.com and its subsidiaries as at the respective
dates thereof and the consolidated results of broadcast.com's operations and
cash flows for the periods indicated, except that the unaudited interim
financial statements may not contain footnotes and were or are subject to normal
and recurring year-end adjustments. The balance sheet of broadcast.com contained
in broadcast.com SEC Reports as of December 31, 1998 is hereinafter referred to
as the "BROADCAST.COM BALANCE SHEET." Except as disclosed in the broadcast.com
Financials, since the date of the broadcast.com Balance Sheet neither
broadcast.com nor any of its subsidiaries has any liabilities required under
GAAP to be set forth on a balance sheet (absolute, accrued, contingent or
otherwise) which are, individually or in the aggregate, material to the
business, results of operations or financial condition of broadcast.com and its
subsidiaries taken as a whole, except for liabilities incurred since the date of
the broadcast.com Balance Sheet in the ordinary course of business consistent
with past practices and liabilities under this Agreement or incurred in
connection with the transactions contemplated hereby.
 
    (c) Broadcast.com has heretofore furnished to Yahoo! a complete and correct
copy of any amendments or modifications, which have not yet been filed with the
SEC but which are required to be filed, to agreements, documents or other
instruments which previously had been filed by broadcast.com with the SEC
pursuant to the Securities Act or the Exchange Act.
 
    2.6  ABSENCE OF CERTAIN CHANGES OR EVENTS.  Since the date of the
broadcast.com Balance Sheet there has not been: (i) any Material Adverse Effect
with respect to broadcast.com and its subsidiaries, taken as a whole, (ii) any
declaration, setting aside or payment of any dividend on, or other distribution
(whether in cash, stock or property) in respect of, any of broadcast.com's
capital stock, or any purchase, redemption or other acquisition by broadcast.com
of any of broadcast.com's capital stock or any other securities of broadcast.com
or any options, warrants, calls or rights to acquire any such shares or other
securities except for repurchases from employees following their termination
pursuant to the terms of their pre-existing stock option or purchase agreements,
(iii) any split, combination or reclassification of any of broadcast.com's
capital stock, (iv) any granting by broadcast.com or any of its subsidiaries of
any increase in compensation or fringe benefits to any of their officers,
directors or managers or employees who earn more than $100,000 per year, or any
payment by broadcast.com or any of its subsidiaries of any bonus to any of their
officers, directors or managers or employees who earn more than $100,000 per
year, or any granting by broadcast.com or any of its subsidiaries of any
increase in severance or termination pay or any entry by broadcast.com or any of
its subsidiaries into, or material modification or amendment of, any currently
effective employment, severance, termination or indemnification agreement or any
agreement the benefits of which are contingent or the terms of which are
materially altered upon the occurrence of a transaction involving broadcast.com
of the nature contemplated hereby, (v) any material change or alteration in the
policy of broadcast.com relating to the granting of stock options to its
employees and consultants, (vi) entry by broadcast.com or any of its
subsidiaries into, or material modification, amendment or cancellation of, any
licensing, distribution, sponsorship, advertising, merchant program or other
similar agreement or which either is not terminable by broadcast.com or its
subsidiaries, as the case may be, without penalty upon no more than 45 days'
prior notice or provides for payments by or to broadcast.com or its subsidiaries
in an amount in excess of $50,000 over the term of the agreement, (vii) any
material change by broadcast.com in its accounting methods, principles or
practices, except as required by concurrent changes in GAAP, or (viii) any
revaluation by broadcast.com of any of its assets,
 
                                       8
<PAGE>
including, without limitation, writing off notes or accounts receivable other
than in the ordinary course of business.
 
    2.7  TAXES.
 
    (a)  DEFINITION OF TAXES.  For the purposes of this Agreement, "TAX" or
"TAXES" refers to (i) any and all federal, state, local and foreign taxes,
assessments and other governmental charges, duties, impositions and liabilities
relating to taxes, including taxes based upon or measured by gross receipts,
income, profits, sales, use and occupation, and value added, ad valorem,
transfer, franchise, withholding, payroll, recapture, employment, excise and
property taxes, together with all interest, penalties and additions imposed with
respect to such amounts, (ii) any liability for payment of any amounts of the
type described in clause (i) as a result of being a member of an affiliated
consolidated, combined or unitary group, and (iii) any liability for amounts of
the type described in clauses (i) and (ii) as a result of any express or implied
obligation to indemnify another person or as a result of any obligations under
any agreements or arrangements with any other person with respect to such
amounts and including any liability for taxes of a predecessor entity.
 
    (b)  TAX RETURNS AND AUDITS.
 
    (i) Broadcast.com and each of its subsidiaries have timely filed all
material federal, state, local and foreign returns, estimates, information
statements and reports ("RETURNS") relating to Taxes required to be filed by or
on behalf of broadcast.com and each of its subsidiaries with any Tax authority,
such Returns are true, correct and complete in all material respects, and
broadcast.com and each of its subsidiaries have paid (where required by law or
otherwise accrued) all Taxes shown to be due on such Returns.
 
    (ii) Broadcast.com and each of its subsidiaries have withheld with respect
to its employees all federal and state income Taxes, Taxes pursuant to the
Federal Insurance Contribution Act ("FICA"), Taxes pursuant to the Federal
Unemployment Tax Act ("FUTA") and other Taxes required to be withheld.
 
   (iii) There is no material Tax deficiency outstanding, proposed or assessed
against broadcast.com or any of its subsidiaries, nor has broadcast.com or any
of its subsidiaries executed any unexpired waiver of any statute of limitations
on or extending the period for the assessment or collection of any Tax that is
still in effect.
 
    (iv) No audit or other examination of any Return of broadcast.com or any of
its subsidiaries by any Tax authority is presently in progress, nor has
broadcast.com or any of its subsidiaries been notified of any request for such
an audit or other examination.
 
    (v) No adjustment of Tax relating to any Returns filed by broadcast.com or
any of its subsidiaries has been proposed in writing formally or informally by
any Tax authority to broadcast.com or any of its subsidiaries or any
representative thereof.
 
    (vi) Neither broadcast.com nor any of its subsidiaries has any liability for
unpaid Taxes which has not been accrued for or reserved on the broadcast.com
Balance Sheet, whether asserted or unasserted, contingent or otherwise, which is
material to broadcast.com, other than any liability for unpaid Taxes that may
have accrued since the date of the broadcast.com Balance Sheet in connection
with the operation of the business of broadcast.com and its subsidiaries in the
ordinary course.
 
   (vii) There is no contract, agreement, plan or arrangement to which
broadcast.com is a party, including but not limited to the provisions of this
Agreement and the agreements entered into in connection with this Agreement,
covering any employee or former employee of broadcast.com or any of its
subsidiaries that, individually or collectively, would be reasonably likely to
give rise to the payment of any amount that would not be deductible pursuant to
Sections 280G, 404 or 162(m) of the Code.
 
  (viii) Neither broadcast.com nor any of its subsidiaries has filed any consent
agreement under Section 341(f) of the Code or agreed to have Section 341(f)(2)
of the Code apply to any disposition of a subsection (f) asset (as defined in
Section 341(f)(4) of the Code) owned by broadcast.com.
 
                                       9
<PAGE>
    (ix) Neither broadcast.com nor any of its subsidiaries is party to or has
any obligation under any tax-sharing, tax indemnity or tax allocation agreement
or arrangement.
 
    (x) Except as may be required as a result of the Merger, broadcast.com and
its subsidiaries have not been and will not be required to include any material
adjustment in Taxable income for any Tax period (or portion thereof) pursuant to
Section 481 or Section 263A of the Code or any comparable provision under state
or foreign Tax laws as a result of transactions, events or accounting methods
employed prior to the Closing.
 
    (xi) Broadcast.com has made available to Yahoo! or its legal or accounting
representatives copies of all foreign, federal and state income tax and all
state sales and use tax Returns for broadcast.com and each of its subsidiaries
filed for all periods since its inception.
 
   (xii) There are no liens, pledges, charges, claims, restrictions on transfer,
mortgages, security interests or other encumbrances of any sort (collectively,
"LIENS") on the assets of broadcast.com or any of its subsidiaries relating to
or attributable to Taxes, other than Liens for Taxes not yet due and payable.
 
    2.8  TITLE TO PROPERTIES; ABSENCE OF LIENS AND ENCUMBRANCES.
 
    (a) Broadcast.com owns no real property interests. The broadcast.com
Disclosure Letter lists all real property leases to which broadcast.com is a
party and each amendment thereto that is in effect as of the date of this
Agreement. All such current leases are in full force and effect, are valid and
effective in accordance with their respective terms, and there is not, under any
of such leases, any existing default or event of default (or event which with
notice or lapse of time, or both, would constitute a default) that would give
rise to a claim against broadcast.com in an amount greater than $50,000.
 
    (b) Broadcast.com has good and valid title to, or, in the case of leased
properties and assets, valid leasehold interests in, all of its tangible
properties and assets, real, personal and mixed, used or held for use in its
business, free and clear of any Liens, except as reflected in the broadcast.com
Financials and except for Liens for Taxes not yet due and payable and such Liens
or other imperfections of title and encumbrances, if any, which are not material
in character, amount or extent, and which do not materially detract from the
value, or materially interfere with the present use, of the property subject
thereto or affected thereby.
 
    2.9  INTELLECTUAL PROPERTY.  For the purposes of this Agreement, the
following terms have the following definitions:
 
       "INTELLECTUAL PROPERTY" shall mean any or all of the following and all
       rights in, arising out of or associated therewith: (i) all United States,
       international and foreign patents and applications therefor and all
       reissues, divisions, renewals, extensions, provisionals, continuations
       and continuations-in-part thereof; (ii) all inventions (whether
       patentable or not), invention disclosures, improvements, trade secrets,
       proprietary information, know how, technology, technical data and
       customer lists, and all documentation relating to any of the foregoing;
       (iii) all copyrights, copyrights registrations and applications therefor,
       and all other rights corresponding thereto throughout the world; (iv) all
       industrial designs and any registrations and applications therefor
       throughout the world; (v) all trade names, logos, common law trademarks
       and service marks, trademark and service mark registrations and
       applications therefor throughout the world; (vi) all databases and data
       collections and all rights therein throughout the world; (vii) all moral
       and economic rights of authors and inventors, however denominated,
       throughout the world; and (viii) any similar or equivalent rights to any
       of the foregoing anywhere in the world.
 
       "BROADCAST.COM INTELLECTUAL PROPERTY" shall mean any Intellectual
       Property that is owned by, or exclusively licensed to, broadcast.com or
       one of its subsidiaries.
 
                                       10
<PAGE>
       "REGISTERED INTELLECTUAL PROPERTY" means all United States, international
       and foreign: (i) patents and patent applications (including provisional
       applications); (ii) registered trademarks, applications to register
       trademarks, intent-to-use applications, or other registrations or
       applications related to trademarks; (iii) registered copyrights and
       applications for copyright registration; and (iv) any other Intellectual
       Property that is the subject of an application, certificate, filing,
       registration or other document issued, filed with, or recorded by any
       state, government or other public legal authority.
 
       "BROADCAST.COM REGISTERED INTELLECTUAL PROPERTY" means all of the
       Registered Intellectual Property owned by, or filed in the name of,
       broadcast.com or one of its subsidiaries.
 
        (a) No broadcast.com Intellectual Property or product or service of
    broadcast.com is subject to any proceeding or outstanding decree, order,
    judgment, agreement, or stipulation of any Governmental Entity restricting
    (other than such restrictions that are contained in the instrument by which
    broadcast.com acquired such broadcast.com Intellectual Property) in any
    manner the use, transfer, or licensing thereof by broadcast.com, or which
    may affect the validity, use or enforceability of such broadcast.com
    Intellectual Property, which in any such case would be reasonably likely to
    have a Material Adverse Effect on broadcast.com.
 
        (b) Each material item of broadcast.com Registered Intellectual Property
    is valid and subsisting. All necessary registration, maintenance and renewal
    fees currently due in connection with such Registered Intellectual Property
    have been made and all necessary documents, recordations and certificates in
    connection with such Registered Intellectual Property have been filed with
    the relevant patent, copyright, trademark or other authorities in the United
    States or foreign jurisdictions, as the case may be, for the purposes of
    maintaining such Registered Intellectual Property, except where the failure
    to do so would not be reasonably likely to have a Material Adverse Effect on
    broadcast.com.
 
        (c) Broadcast.com or one of its subsidiaries owns and has good and
    exclusive title to, or has license sufficient for the conduct of its
    business as currently conducted to, each material item of broadcast.com
    Intellectual Property used in connection with the conduct of its business as
    currently conducted free and clear of any lien or encumbrance (excluding
    licenses and related restrictions); and broadcast.com or one of its
    subsidiaries is the exclusive owner of all trademarks and trade names used
    in connection with and material to the operation or conduct of the business
    of broadcast.com and its subsidiaries, including the sale of any products or
    the provision of any services by broadcast.com and its subsidiaries.
 
        (d) Broadcast.com or one of its subsidiaries owns exclusively, and has
    good title to, all copyrighted works that are broadcast.com products or
    which broadcast.com otherwise expressly purports to own.
 
        (e) To the extent that any material Intellectual Property has been
    developed or created by a third party for broadcast.com or any of its
    subsidiaries, broadcast.com or its subsidiaries, as the case may be, has a
    written agreement with such third party with respect thereto and
    broadcast.com or its subsidiary thereby either (i) has obtained ownership of
    and is the exclusive owner of, or (ii) has obtained a license sufficient for
    the conduct of its business as currently conducted to all such third party's
    Intellectual Property in such work, material or invention by operation of
    law or by valid assignment.
 
        (f) The broadcast.com Disclosure Letter lists all material contracts,
    licenses and agreements to which broadcast.com is a party (i) with respect
    to broadcast.com Intellectual Property licensed or transferred to any third
    party (other than end-user licenses in the ordinary course); or (ii)
    pursuant to which a third party has licensed or transferred any material
    Intellectual Property to broadcast.com.
 
        (g) All material contracts, licenses and agreements relating to the
    broadcast.com Intellectual Property are in full force and effect. The
    consummation of the transactions contemplated by this
 
                                       11
<PAGE>
    Agreement will neither violate nor result in the breach, modification,
    cancellation, termination, or suspension of such contracts, licenses and
    agreements in accordance with its terms, the effect of which would have a
    Material Adverse Effect on broadcast.com. Broadcast.com is in material
    compliance with, and has not materially breached any term of any of such
    contracts, licenses and agreements and, to the knowledge of broadcast.com,
    all other parties to such contracts, licenses and agreements are in
    compliance in all material respects with, and have not materially breached
    any term of, such contracts, licenses and agreements. Following the Closing
    Date, the Surviving Corporation will be permitted to exercise all of
    broadcast.com's rights under such contracts, licenses and agreements to the
    same extent broadcast.com would have been able to had the transactions
    contemplated by this Agreement not occurred and without the payment of any
    additional amounts or consideration other than ongoing fees, royalties or
    payments which broadcast.com would otherwise be required to pay.
 
        (h) The operation of the business of broadcast.com as such business
    currently is conducted, including broadcast.com's design, development,
    marketing and sale of the products or services of broadcast.com (including
    with respect to products currently under development) has not, does not and
    will not infringe or misappropriate in any material manner the Intellectual
    Property of any third party or, to the knowledge of broadcast.com,
    constitute unfair competition or trade practices under the laws of any
    jurisdiction.
 
        (i) Broadcast.com has not received written notice from any third party,
    and to the knowledge of broadcast.com, no other pending overt threat from
    any third party, that the operation of the business of broadcast.com or any
    act, product or service of broadcast.com, infringes or misappropriates the
    Intellectual Property of any third party or constitutes unfair competition
    or trade practices under the laws of any jurisdiction.
 
        (j) To the knowledge of broadcast.com, no person has or is infringing or
    misappropriating any broadcast.com Intellectual Property.
 
        (k) Broadcast.com and its subsidiaries have taken reasonable steps to
    protect broadcast.com's and its subsidiaries' rights in broadcast.com's and
    such subsidiaries' confidential information and trade secrets that they wish
    to protect or any trade secrets or confidential information of third parties
    provided to broadcast.com or such subsidiaries, and, without limiting the
    foregoing, broadcast.com and its subsidiaries have and enforce a policy
    requiring each employee and contractor to execute a proprietary
    information/confidentiality agreement in substantially the form provided to
    Yahoo!, and except under confidentiality obligations, there has been not
    disclosure by broadcast.com or one of its subsidiaries of any such trade
    secrets or confidential information.
 
    2.10  COMPLIANCE WITH LAWS; PERMITS; RESTRICTIONS.
 
    (a) Neither broadcast.com nor any of its subsidiaries is, in any material
respect, in conflict with, or in default or in violation of (i) any law, rule,
regulation, order, judgment or decree applicable to broadcast.com or any of its
subsidiaries or by which broadcast.com or any of its subsidiaries or any of
their respective properties is bound or affected, or (ii) any material note,
bond, mortgage, indenture, contract, agreement, lease, license, permit,
franchise or other instrument or obligation to which broadcast.com or any of its
subsidiaries is a party or by which broadcast.com or any of its subsidiaries or
its or any of their respective properties is bound or affected, except for
conflicts, violations and defaults that (individually or in the aggregate) would
not be reasonably likely to result in a Material Adverse Effect on
broadcast.com. No investigation or review by any Governmental Entity is pending
or, to broadcast.com's knowledge, has been threatened in a writing delivered to
broadcast.com against broadcast.com or any of its subsidiaries, nor, to
broadcast.com's knowledge, has any Governmental Entity indicated an intention to
conduct an investigation of broadcast.com or any of its subsidiaries. There is
no material agreement, judgment, injunction, order or decree binding upon
broadcast.com or any of its subsidiaries which has or could reasonably be
expected to have the effect of prohibiting or materially impairing any business
practice of
 
                                       12
<PAGE>
broadcast.com or any of its subsidiaries, any acquisition of material property
by broadcast.com or any of its subsidiaries or the conduct of business by
broadcast.com as currently conducted.
 
    (b) Broadcast.com and its subsidiaries hold, to the extent legally required,
all permits, licenses, variances, exemptions, orders and approvals from
governmental authorities that are material to and required for the operation of
the business of broadcast.com as currently conducted (collectively, the
"BROADCAST.COM PERMITS"). Broadcast.com and its subsidiaries are in compliance
in all material respects with the terms of the broadcast.com Permits.
 
    2.11  LITIGATION.  There are no claims, suits, actions or proceedings that
have a reasonable likelihood of success on the merits pending or, to the
knowledge of broadcast.com, threatened against broadcast.com or any of its
subsidiaries, before any Governmental Entity or any arbitrator that seek to
restrain or enjoin the consummation of the transactions contemplated by this
Agreement or which could reasonably be expected, either singularly or in the
aggregate with all such claims, actions or proceedings, to have a Material
Adverse Effect on broadcast.com or the Surviving Corporation following the
Merger or have a material adverse effect on the ability of the parties hereto to
consummate the Merger. No Governmental Entity has at any time challenged or
questioned in a writing delivered to broadcast.com the legal right of
broadcast.com to design, offer or sell any of its services in the present manner
or style thereof.
 
    2.12  EMPLOYEE BENEFIT PLANS.
 
    (a)  DEFINITIONS.  With the exception of the definition of "Affiliate" set
forth in Section 2.12(a)(i) below (which definition shall apply only to this
Section 2.12), for purposes of this Agreement, the following terms shall have
the meanings set forth below:
 
        (i) "AFFILIATE" shall mean any other person or entity under common
    control with broadcast.com within the meaning of Section 414(b), (c), (m) or
    (o) of the Code and the regulations issued thereunder;
 
        (ii) "BROADCAST.COM EMPLOYEE PLAN" shall mean any plan, program, policy,
    practice, contract, agreement or other arrangement providing for
    compensation, severance, termination pay, performance awards, stock or
    stock-related awards, fringe benefits or other employee benefits or
    remuneration of any kind, whether written or unwritten or otherwise, funded
    or unfunded, including without limitation, each "EMPLOYEE BENEFIT PLAN,"
    within the meaning of Section 3(3) of ERISA which is or has been maintained,
    contributed to, or required to be contributed to, by broadcast.com or any
    Affiliate for the benefit of any Employee and pursuant to which
    broadcast.com or any Affiliate has any material liability;
 
       (iii) "COBRA" shall mean the Consolidated Omnibus Budget Reconciliation
    Act of 1985, as amended;
 
        (iv) "DOL" shall mean the Department of Labor;
 
        (v) "EMPLOYEE" shall mean any current, former, or retired employee,
    officer, or director of broadcast.com or any Affiliate;
 
        (vi) "EMPLOYEE AGREEMENT" shall mean each management, employment,
    severance, consulting, relocation, repatriation, expatriation, visas, work
    permit or similar agreement or contract between broadcast.com or any
    Affiliate and any Employee or consultant;
 
       (vii) "ERISA" shall mean the Employee Retirement Income Security Act of
    1974, as amended;
 
      (viii) "FMLA" shall mean the Family Medical Leave Act of 1993, as amended;
 
        (ix) "IRS" shall mean the Internal Revenue Service;
 
        (x) "MULTIEMPLOYER PLAN" shall mean any "PENSION PLAN" (as defined
    below) which is a "multiemployer plan," as defined in Section 3(37) of
    ERISA;
 
                                       13
<PAGE>
        (xi) "PBGC" shall mean the Pension Benefit Guaranty Corporation; and
 
       (xii) "PENSION PLAN" shall mean each broadcast.com Employee Plan which is
    an "employee pension benefit plan," within the meaning of Section 3(2) of
    ERISA.
 
    (b)  SCHEDULE.  The broadcast.com Disclosure Letter contains an accurate and
complete list of each broadcast.com Employee Plan and each Employee Agreement.
Broadcast.com does not have any intention or commitment to establish any new
broadcast.com Employee Plan, to modify any broadcast.com Employee Plan or
Employee Agreement (except to the extent required by law or to conform any such
broadcast.com Employee Plan or Employee Agreement to the requirements of any
applicable law, in each case as previously disclosed to Yahoo! in writing, or as
required by this Agreement), or to adopt any broadcast.com Employee Plan or
Employee Agreement, nor does it have any commitment to do any of the foregoing.
The broadcast.com Disclosure Letter also contains a list of all broadcast.com
employees as of the date hereof, each such person's date of hire and each such
person's annual compensation.
 
    (c)  DOCUMENTS.  Broadcast.com has provided or made available to Yahoo!: (i)
correct and complete copies of all material documents embodying to each
broadcast.com Employee Plan and each Employee Agreement including all amendments
thereto and written interpretations thereof; (ii) the most recent annual
actuarial valuations, if any, prepared for each broadcast.com Employee Plan;
(iii) the three (3) most recent annual reports (Form Series 5500 and all
schedules and financial statements attached thereto), if any, required under
ERISA or the Code in connection with each broadcast.com Employee Plan or related
trust; (iv) if the broadcast.com Employee Plan is funded, the most recent annual
and periodic accounting of broadcast.com Employee Plan assets; (v) the most
recent summary plan description together with the summary of material
modifications thereto, if any, required under ERISA with respect to each
broadcast.com Employee Plan; (vi) all IRS determination, opinion, notification
and advisory letters, and rulings relating to broadcast.com Employee Plans and
copies of all applications and correspondence to or from the IRS or the DOL with
respect to any broadcast.com Employee Plan; (vii) all material written
agreements and contracts relating to each broadcast.com Employee Plan,
including, but not limited to, administrative service agreements, group annuity
contracts and group insurance contracts; (viii) all communications material to
any Employee or Employees relating to any broadcast.com Employee Plan and any
proposed broadcast.com Employee Plans, in each case, relating to any amendments,
terminations, establishments, increases or decreases in benefits, acceleration
of payments or vesting schedules or other events which would result in any
material liability to broadcast.com; and (ix) all registration statements and
prospectuses prepared in connection with each broadcast.com Employee Plan.
 
    (d)  EMPLOYEE PLAN COMPLIANCE.  (i) Broadcast.com has performed in all
material respects all obligations required to be performed by it under, is not
in default or violation of; and has no knowledge of any material default or
violation by any other party to each broadcast.com Employee Plan, and each
broadcast.com Employee Plan has been established and maintained in all material
respects in accordance with its terms and in compliance with all applicable
laws, statutes, orders, rules and regulations, including but not limited to
ERISA or the Code; (ii) each broadcast.com Employee Plan intended to qualify
under Section 401(a) of the Code and each trust intended to qualify under
Section 501(a) of the Code has either received a favorable determination letter
from the IRS with respect to each such Plan as to its qualified status under the
Code or has remaining a period of time under applicable Treasury regulations or
IRS pronouncements in which to apply for such a determination letter and make
any amendments necessary to obtain a favorable determination and no event has
occurred which would adversely affect the status of such determination letter or
the qualified status of such Plan; (iii) no "prohibited transaction," within the
meaning of Section 4975 of the Code or Sections 406 and 407 of ERISA, and not
otherwise exempt under Section 408 of ERISA, has occurred with respect to any
broadcast.com Employee Plan; (iv) there are no actions, suits or claims pending,
or, to the knowledge of broadcast.com, threatened or reasonably anticipated
(other than routine claims for benefits) against any broadcast.com Employee Plan
or against the assets of any broadcast.com Employee Plan; (v) each broadcast.com
Employee Plan can be amended, terminated or otherwise discontinued after the
Effective Time in accordance with its terms, without
 
                                       14
<PAGE>
liability to Yahoo!, broadcast.com or any of its Affiliates (other than ordinary
administration expenses typically incurred in a termination event); (vi) there
are no audits, inquiries or proceedings pending or, to the knowledge of
broadcast.com, threatened by the IRS or DOL with respect to any broadcast.com
Employee Plan; and (vii) neither broadcast.com nor any Affiliate is subject to
any penalty or tax with respect to any broadcast.com Employee Plan under Section
402(i) of ERISA or Sections 4975 through 4980 of the Code.
 
    (e)  PENSION PLANS.  Broadcast.com does not now, nor has it ever,
maintained, established, sponsored, participated in, or contributed to, any
Pension Plan which is subject to Title IV of ERISA or Section 412 of the Code.
 
    (f)  MULTIEMPLOYER PLANS.  At no time has broadcast.com contributed to or
been requested to contribute to any Multiemployer Plan.
 
    (g)  NO POST-EMPLOYMENT OBLIGATIONS.  No broadcast.com Employee Plan
provides, or has any liability to provide, retiree life insurance, retiree
health or other retiree employee welfare benefits to any person for any reason,
except as may be required by COBRA or other applicable statute, and
broadcast.com has never represented, promised or contracted (whether in oral or
written form) to any Employee (either individually or to Employees as a group)
or any other person that such Employee(s) or other person would be provided with
retiree life insurance, retiree health or other retiree employee welfare
benefit, except to the extent required by statute.
 
    (h)  COBRA; FMLA.  Neither broadcast.com nor any Affiliate has, prior to the
Effective Time, and in any material respect, violated any of the health care
continuation requirements of COBRA, the requirements of FMLA or any similar
provisions of state law applicable to its Employees.
 
    (i)  EFFECT OF TRANSACTION.
 
    (i) The execution of this Agreement and the consummation of the transactions
contemplated hereby will not (either alone or upon the occurrence of any
additional or subsequent events) constitute an event under any broadcast.com
Employee Plan, Employee Agreement, trust or loan that will or may result in any
payment (whether of severance pay or otherwise), acceleration, forgiveness of
indebtedness, vesting, distribution, increase in benefits or obligation to fund
benefits with respect to any Employee.
 
    (ii) No payment or benefit which will or may be made by broadcast.com or its
Affiliates with respect to any Employee as a result of the transactions
contemplated by this Agreement will be characterized as an "excess parachute
payment," within the meaning of Section 280G(b)(1) of the Code or will be
treated as a nondeductible expense within the meaning of Section 162 of the
Code.
 
    (j)  EMPLOYMENT MATTERS.  Broadcast.com: (i) is in compliance in all
material respects with all applicable foreign, federal, state and local laws,
rules and regulations respecting employment, employment practices, terms and
conditions of employment and wages and hours, in each case, with respect to
Employees; (ii) has withheld all amounts required by law or by agreement to be
withheld from the wages, salaries and other payments to Employees; (iii) is not
liable in any material respect for any arrears of wages or any taxes or any
penalty for failure to comply with any of the foregoing; and (iv) is not liable
for any material payment to any trust or other fund or to any governmental or
administrative authority, with respect to unemployment compensation benefits,
social security or other benefits or obligations for Employees (other than
routine payments to be made in the normal course of business and consistent with
past practice). There are no pending, or, to broadcast.com's knowledge,
threatened or reasonably anticipated claims or actions against broadcast.com
under any worker's compensation policy or long-term disability policy which
would be reasonably likely to have a Material Adverse Effect on broadcast.com.
To broadcast.com's knowledge, no Employee of broadcast.com has violated any
employment contract, nondisclosure agreement or noncompetition agreement by
which such Employee is bound due to such Employee being employed by
broadcast.com and disclosing to broadcast.com or using trade secrets or
proprietary information of any other person or entity.
 
                                       15
<PAGE>
    (k)  LABOR.  No work stoppage or labor strike against broadcast.com is
pending, or to broadcast.com's knowledge, threatened or reasonably anticipated.
Broadcast.com does not know of any activities or proceedings of any labor union
to organize any Employees. There are no actions, suits, claims, labor disputes
or grievances pending, or, to the knowledge of broadcast.com, threatened or
reasonably anticipated relating to any labor, safety or discrimination matters
involving any Employee, including, without limitation, charges of unfair labor
practices or discrimination complaints, which, if adversely determined, would,
individually or in the aggregate, result in any material liability to
broadcast.com. Neither broadcast.com nor any of its subsidiaries has engaged in
any unfair labor practices within the meaning of the National Labor Relations
Act. Broadcast.com is not presently, nor has it been in the past, a party to, or
bound by, any collective bargaining agreement or union contract with respect to
Employees and no collective bargaining agreement is being negotiated by
broadcast.com.
 
    (l)  INTERNATIONAL EMPLOYEE PLAN.  No Employee Plan has been adopted or
maintained by broadcast.com, whether informally or formally, for the benefit of
Employees outside the United States.
 
    2.13  ENVIRONMENTAL MATTERS.
 
    (a)  HAZARDOUS MATERIAL.  Except as would not result in material liability
to broadcast.com, no underground storage tanks and no amount of any substance
that has been designated by any Governmental Entity or by applicable federal,
state or local law to be radioactive, toxic, hazardous or otherwise a danger to
health or the environment, including, without limitation, PCBs, asbestos,
petroleum, urea-formaldehyde and all substances listed as hazardous substances
pursuant to the Comprehensive Environmental Response, Compensation, and
Liability Act of 1980, as amended, or defined as a hazardous waste pursuant to
the United States Resource Conservation and Recovery Act of 1976, as amended,
and the regulations promulgated pursuant to said laws, but excluding office and
janitorial supplies, (a "HAZARDOUS MATERIAL") are present, as a result of the
actions of broadcast.com or any of its subsidiaries or any affiliate of
broadcast.com, or, to broadcast.com's knowledge, as a result of any actions of
any third party or otherwise, in, on or under any property, including the land
and the improvements, ground water and surface water thereof that broadcast.com
or any of its subsidiaries has at any time owned, operated, occupied or leased.
 
    (b)  HAZARDOUS MATERIALS ACTIVITIES.  Except as would not result in a
material liability to broadcast.com (in any individual case or in the aggregate)
(i) neither broadcast.com nor any of its subsidiaries has transported, stored,
used, manufactured, disposed of released or exposed its employees or others to
Hazardous Materials in violation of any law, and (ii) neither broadcast.com nor
any of its subsidiaries has disposed of; transported, sold, used, released,
exposed its employees or others to or manufactured any product containing a
Hazardous Material (collectively "HAZARDOUS MATERIALS ACTIVITIES") in violation
of any rule, regulation, treaty or statute promulgated by any Governmental
Entity in effect prior to or as of the date hereof to prohibit, regulate or
control Hazardous Materials or any Hazardous Material Activity.
 
    (c)  PERMITS.  Broadcast.com and its subsidiaries currently hold all
environmental approvals, permits, licenses, clearances and consents (the
"BROADCAST.COM ENVIRONMENTAL PERMITS") material to and necessary for the conduct
of broadcast.com's and its subsidiaries' Hazardous Material Activities and other
businesses of broadcast.com and its subsidiaries as such activities and
businesses are currently being conducted.
 
    2.14  AGREEMENTS, CONTRACTS AND COMMITMENTS.  Except as otherwise set forth
in the broadcast.com Disclosure Letter, neither broadcast.com nor any of its
subsidiaries is a party to or is bound by:
 
        (a) any employment agreement, contract or commitment with any employee
    or member of broadcast.com's Board of Directors, other than those that are
    terminable by broadcast.com or any of its subsidiaries on no more than
    thirty days notice without liability or financial obligation, except to the
    extent general principles of wrongful termination law may limit
    broadcast.com's or any of its subsidiaries' ability to terminate employees
    at will, or any consulting agreement;
 
                                       16
<PAGE>
        (b) any agreement or plan, including, without limitation, any stock
    option plan, stock appreciation right plan or stock purchase plan, any of
    the benefits of which will be increased, or the vesting of benefits of which
    will be accelerated, by the occurrence of any of the transactions
    contemplated by this Agreement or the value of any of the benefits of which
    will be calculated on the basis of any of the transactions contemplated by
    this Agreement;
 
        (c) any agreement of indemnification outside the ordinary course of
    broadcast.com's business or any guaranty;
 
        (d) any agreement, contract or commitment containing any covenant
    limiting in any respect the right of broadcast.com or any of its
    subsidiaries to engage in any line of business or to compete with any person
    or granting any exclusive distribution rights;
 
        (e) any agreement, contract or commitment currently in force relating to
    the disposition or acquisition by broadcast.com or any of its subsidiaries
    after the date of this Agreement of a material amount of assets not in the
    ordinary course of business or pursuant to which broadcast.com has any
    material ownership interest in any corporation, partnership, joint venture
    or other business enterprise other than broadcast.com's subsidiaries;
 
        (f) any licensing, distribution, sponsorship, advertising, merchant
    program or other similar agreement to which broadcast.com or one of its
    subsidiaries is a party which may not be canceled by broadcast.com or its
    subsidiaries, as the case may be, without penalty in excess of $50,000 upon
    notice of 45 days or less or which provides for payments by or to
    broadcast.com or its subsidiaries in an amount in excess of $50,000 over the
    term of the agreement;
 
        (g) any agreement, contract or commitment currently in force to provide
    source code to any third party for any product or technology; or
 
        (h) any other agreement, contract or commitment currently in effect that
    is material to broadcast.com's business as presently conducted.
 
    Neither broadcast.com nor any of its subsidiaries, nor to broadcast.com's
knowledge any other party to a broadcast.com Contract (as defined below), is in
breach, violation or default under, and neither broadcast.com nor any of its
subsidiaries has received written notice (or to its knowledge, any other form of
notice) that it has breached, violated or defaulted under, any of the material
terms or conditions of any of the agreements, contracts or commitments to which
broadcast.com or any of its subsidiaries is a party or by which it is bound that
are required to be disclosed in the broadcast.com Disclosure Letter pursuant to
clauses (a) through (h) above or pursuant to Section 2.9 hereof (any such
agreement, contract or commitment, a "BROADCAST.COM CONTRACT") in such a manner
as would permit any other party to cancel or terminate any such broadcast.com
Contract or seek damages or other remedies the effect of which would have a
Material Adverse Effect on broadcast.com.
 
    2.15  POOLING OF INTERESTS.  To the knowledge of broadcast.com, based on
consultation with its independent accountants, neither broadcast.com nor any of
its directors, officers, affiliates or stockholders has taken or agreed to take
any action which would preclude Yahoo!'s ability to account for the Merger as a
pooling of interests.
 
    2.16  CHANGE OF CONTROL PAYMENTS.  The broadcast.com Disclosure Letter sets
forth each plan or agreement pursuant to which any amounts may become payable
(whether currently or in the future) to current or former officers and directors
of broadcast.com as a result of or in connection with the Merger.
 
    2.17  STATEMENTS; PROXY STATEMENT/PROSPECTUS.  The information supplied by
broadcast.com for inclusion in the Registration Statement (as defined in Section
3.3(b)) shall not at the time the Registration Statement is filed with the SEC
and at the time it becomes effective under the Securities Act contain any untrue
statement of a material fact or omit to state any material fact required to be
stated therein or
 
                                       17
<PAGE>
necessary in order to make the statements therein not misleading. The
information supplied by broadcast.com for inclusion in the proxy
statement/prospectus to be sent to the stockholders of broadcast.com in
connection with the meeting of broadcast.com's stockholders to consider the
approval and adoption of this Agreement and the approval of the Merger (the
"BROADCAST.COM STOCKHOLDERS' MEETING") (such proxy statement/prospectus as
amended or supplemented is referred to herein as the "PROXY STATEMENT/
PROSPECTUS") shall not, on the date the Proxy Statement/Prospectus is first
mailed to broadcast.com's stockholders or at the time of the broadcast.com
Stockholders' Meeting, contain any untrue statement of a material fact or omit
to state any material fact required to be stated therein or necessary in order
to make the statements therein, in light of the circumstances under which they
are made, not false or misleading; or omit to state any material fact necessary
to correct any statement in any earlier communication with respect to the
solicitation of proxies for the broadcast.com Stockholders' Meeting which has
become false or misleading. If at any time prior to the Effective Time any event
relating to broadcast.com or any of its affiliates, officers or directors should
be discovered by broadcast.com which is required to be set forth in an amendment
to the Registration Statement or a supplement to the Proxy Statement/Prospectus,
broadcast.com shall promptly inform Yahoo!. Notwithstanding the foregoing,
broadcast.com makes no representation or warranty with respect to any
information supplied by Yahoo! or Merger Sub which is contained in any of the
foregoing documents.
 
    2.18  BOARD APPROVAL.  The Board of Directors of broadcast.com has, as of
the date of this Agreement, determined (i) that the Merger is advisable and fair
to, and in the best interests of broadcast.com and its stockholders and (ii) to
recommend that the stockholders of broadcast.com approve and adopt this
Agreement and approve the Merger.
 
    2.19  BROKERS' AND FINDERS' FEES.  Except for fees payable to Morgan Stanley
& Co. Incorporated ("MORGAN STANLEY"), broadcast.com has not incurred, nor will
it incur, directly or indirectly, any liability for brokerage or finders' fees
or agents' commissions or any similar charges in connection with this Agreement
or any transaction contemplated hereby. A copy of the Morgan Stanley engagement
letter with broadcast.com has been previously provided to Yahoo!.
 
    2.20  FAIRNESS OPINION.  Broadcast.com's Board of Directors has received an
opinion from Morgan Stanley as of the date hereof, to the effect that, as of the
date hereof, the Exchange Ratio is fair from a financial point of view to
broadcast.com's stockholders (other than Yahoo! and its affiliates).
 
    2.21  AFFILIATES.  Set forth on the broadcast.com Disclosure Letter is a
list of those persons who may be deemed to be, in broadcast.com's reasonable
judgment, affiliates of broadcast.com within the meaning of Rule 145 promulgated
under the Securities Act (each a "BROADCAST.COM AFFILIATE").
 
    2.22  SECTION 203 NOT APPLICABLE.  The Board of Directors of broadcast.com
has taken all actions so that the restrictions contained in Section 203 of the
Delaware General Corporation Law applicable to a "business combination" (as
defined in such Section 203) will not apply to the execution, delivery or
performance of this Agreement or to the consummation of the Merger or the other
transactions contemplated by this Agreement.
 
                                  ARTICLE III
            REPRESENTATIONS AND WARRANTIES OF YAHOO! AND MERGER SUB
 
    Yahoo! and Merger Sub represent and warrant to broadcast.com, subject to the
exceptions specifically disclosed in writing in the disclosure letter delivered
by Yahoo! to broadcast.com dated as of the date hereof and certified by a duly
authorized officer of Yahoo! (the "YAHOO! DISCLOSURE LETTER"), as follows:
 
    3.1  ORGANIZATION OF YAHOO! AND MERGER SUB.
 
    (a) Each of Yahoo! and Merger Sub (i) is a corporation duly organized,
validly existing and in good standing under the laws of the jurisdiction in
which it is organized; (ii) has the corporate or other power and authority to
own, lease and operate its assets and property and to carry on its business as
now being
 
                                       18
<PAGE>
conducted; and (iii) except as would not be material to Yahoo!, is duly
qualified or licensed to do business in each jurisdiction where the character of
the properties owned, leased or operated by it or the nature of its activities
makes such qualification or licensing necessary.
 
    (b) Yahoo! has delivered or made available to broadcast.com a true and
correct copy of the Certificate of Incorporation and Bylaws of Yahoo!, each as
amended to date, and each such instrument is in full force and effect. Neither
Yahoo! nor any of its subsidiaries is in violation of any of the provisions of
its Certificate of Incorporation or Bylaws or equivalent governing instruments.
 
    3.2  YAHOO! AND MERGER SUB CAPITAL STRUCTURE.  The authorized capital stock
of Yahoo! consists of 225,000,000 shares of Yahoo! Common Stock, of which there
were 202,926,761 shares issued and outstanding as of March 31, 1999, and
10,000,000 shares of Preferred Stock, none of which are issued and outstanding.
All outstanding shares of Yahoo! Common Stock are duly authorized, validly
issued, fully paid and nonassessable and are not subject to preemptive rights
created by statute, the Certificate of Incorporation or Bylaws of Yahoo! or any
agreement or document to which Yahoo! is a party or by which it is bound. As of
March 31, 1999, there were options outstanding to purchase an aggregate of
50,823,743 shares of Yahoo! Common Stock under Yahoo!'s stock option plans. The
authorized capital stock of Merger Sub consists of 1,000 shares of Common Stock,
$0.01 par value, all of which, as of the date hereof, are issued and outstanding
and are held by Yahoo!. Merger Sub was formed for the purpose of consummating
the Merger and has no material assets or liabilities except as necessary for
such purpose.
 
    3.3  AUTHORITY.
 
    (a) Each of Yahoo! and Merger Sub has all requisite corporate power and
authority to enter into this Agreement and to consummate the transactions
contemplated hereby. The execution and delivery of this Agreement and the
consummation of the transactions contemplated hereby have been duly authorized
by all necessary corporate action on the part of Yahoo! and Merger Sub, subject
only to the filing of the Certificate of Merger pursuant to Delaware Law. This
Agreement has been duly executed and delivered by each of Yahoo! and Merger Sub
and, assuming the due authorization, execution and delivery by broadcast.com,
constitutes the valid and binding obligation of Yahoo! and Merger Sub,
enforceable against Yahoo! and Merger Sub in accordance with its terms, except
as enforceability may be limited by bankruptcy and other similar laws and
general principles of equity. The execution and delivery of this Agreement by
each of Yahoo! and Merger Sub does not, and the performance of this Agreement by
each of Yahoo! and Merger Sub will not, (i) conflict with or violate the
Certificate of Incorporation or Bylaws of Yahoo! or Merger Sub, (ii) conflict
with or violate any law, rule, regulation, order, judgment or decree applicable
to Yahoo! or Merger Sub or by which any of their respective properties is bound
or affected, or (iii) result in any material breach of or constitute a material
default (or an event that with notice or lapse of time or both would become a
material default) under, or impair Yahoo!'s rights or alter the rights or
obligations of any third party under, or give to others any rights of
termination, amendment, acceleration or cancellation of; or result in the
creation of a material lien or encumbrance on any of the material properties or
assets of Yahoo! or Merger Sub pursuant to, any note, bond, mortgage, indenture,
contract, agreement, lease, license, permit, franchise or other instrument or
obligation, in each case that is material to Yahoo!, to which Yahoo! or Merger
Sub is a party or by which Yahoo! or Merger Sub or any of their respective
properties are bound or affected.
 
    (b) No consent, approval, order or authorization of; or registration,
declaration or filing with any Governmental Entity is required to be obtained or
made by Yahoo! or Merger Sub in connection with the execution and delivery of
this Agreement or the consummation of the Merger, except for (i) the filing of a
Form S-4 (or any similar successor form thereto) Registration Statement (the
"REGISTRATION STATEMENT") with the SEC in accordance with the Securities Act,
(ii) the filing of the Certificate of Merger with the Secretary of State of the
State of Delaware, (iii) such consents, approvals, orders, authorizations,
registrations, declarations and filings as may be required under applicable
federal, foreign and state securities (or related) laws and the HSR Act, and (v)
such other consents, authorizations, filings, approvals
 
                                       19
<PAGE>
and registrations which if not obtained or made would not be material to Yahoo!
or broadcast.com or have a material adverse effect on the ability of the parties
hereto to consummate the Merger.
 
    3.4  SEC FILINGS; YAHOO! FINANCIAL STATEMENTS.
 
    (a) Yahoo! has filed all forms, reports and documents required to be filed
by Yahoo! with the SEC since January 1, 1997, and has made available to
broadcast.com such forms, reports and documents in the form filed with the SEC.
All such required forms, reports and documents (including those that Yahoo! may
file subsequent to the date hereof) are referred to herein as the "YAHOO! SEC
REPORTS." As of their respective dates, the Yahoo! SEC Reports (i) were prepared
in accordance with the requirements of the Securities Act or the Exchange Act,
as the case may be, and the rules and regulations of the SEC thereunder
applicable to such Yahoo! SEC Reports, and (ii) did not at the time they were
filed (or if amended or superseded by a filing prior to the date of this
Agreement, then on the date of such filing) contain any untrue statement of a
material fact or omit to state a material fact required to be stated therein or
necessary in order to make the statements therein, in the light of the
circumstances under which they were made, not misleading. None of Yahoo!'s
subsidiaries is required to file any forms, reports or other documents with the
SEC.
 
    (b) Each of the consolidated financial statements (including, in each case,
any related notes thereto) contained in the Yahoo! SEC Reports (the "YAHOO!
FINANCIALS"), including any Yahoo! SEC Reports filed after the date hereof until
the Closing, (i) complied as to form in all material respects with the published
rules and regulations of the SEC with respect thereto, (ii) was prepared in
accordance with GAAP applied on a consistent basis throughout the periods
involved (except as may be indicated in the notes thereto or, in the case of
unaudited interim financial statements, as may be permitted by the SEC on Form
1O-Q under the Exchange Act) and (iii) fairly presented the consolidated
financial position of Yahoo! and its subsidiaries as at the respective dates
thereof and the consolidated results of Yahoo!'s operations and cash flows for
the periods indicated, except that the unaudited interim financial statements
may not contain footnotes and were or are subject to normal and recurring
year-end adjustments. The balance sheet of Yahoo! contained in Yahoo! SEC
Reports as of December 31, 1998 is hereinafter referred to as the "YAHOO!
BALANCE SHEET."
 
    (c) Yahoo! has heretofore furnished to broadcast.com a complete and correct
copy of any amendments or modifications, which have not yet been filed with the
SEC but which are required to be filed, to agreements, documents or other
instruments which previously had been filed by Yahoo! with the SEC pursuant to
the Securities Act or the Exchange Act.
 
    3.5  ABSENCE OF CERTAIN CHANGES OR EVENTS.  Since the date of the Yahoo!
Balance Sheet there has not been any Material Adverse Effect with respect to
Yahoo! and its subsidiaries, taken as a whole.
 
    3.6  PROXY STATEMENT/PROSPECTUS.  The information supplied by Yahoo! for
inclusion in the Registration Statement shall not at the time the Registration
Statement is filed with the SEC and at the time it becomes effective under the
Securities Act, contain any untrue statement of a material fact or omit to state
any material fact required to be stated therein or necessary in order to make
the statements therein not misleading. The information supplied by Yahoo! for
inclusion in the Proxy Statement/Prospectus shall not, on the date the Proxy
Statement/Prospectus is first mailed to broadcast.com's stockholders or at the
time of the broadcast.com Stockholders' Meeting contain any untrue statement of
a material fact or omit to state any material fact required to be stated therein
or necessary in order to make the statements therein, in light of the
circumstances under which they are made, not false or misleading, or omit to
state any material fact necessary to correct any statement in any earlier
communication with respect to the solicitation of proxies for the broadcast.com
Stockholders' Meeting which has become false or misleading. If at any time prior
to the Effective Time, any event relating to Yahoo! or any of its affiliates,
officers or directors should be discovered by Yahoo! which is required to be set
forth in an amendment to the Registration Statement
 
                                       20
<PAGE>
or a supplement to the Proxy Statement/Prospectus, Yahoo! shall promptly inform
broadcast.com. Notwithstanding the foregoing, Yahoo! makes no representation or
warranty with respect to any information supplied by broadcast.com which is
contained in any of the foregoing documents.
 
    3.7  LITIGATION.  There are no claims, suits, actions or proceedings that
have a reasonable likelihood of success on the merits pending or, to the
knowledge of Yahoo!, threatened against, relating to or affecting Yahoo! or any
of its subsidiaries, before any court, governmental department, commission,
agency, instrumentality or authority, or any arbitrator that seek to restrain or
enjoin the consummation of the transactions contemplated by this Agreement.
 
    3.8  POOLING OF INTERESTS.  To the knowledge of Yahoo!, based on
consultation with its independent accountants, neither Yahoo! nor any of its
directors, officers, affiliates or stockholders has taken or agreed to take any
action which would preclude Yahoo!'s ability to account for the Merger as a
pooling of interests.
 
    3.9  AFFILIATES.  Set forth on the Yahoo! Disclosure Letter is a list of
those persons who may be deemed to be, in Yahoo!'s reasonable judgment,
affiliates of Yahoo! within the meaning of Rule 145 promulgated under the
Securities Act (each a "YAHOO! AFFILIATE").
 
    3.10  VALID ISSUANCE.  The Yahoo! Common Stock to be issued in the Merger,
when issued in accordance with the provisions of this Agreement, will be validly
issued, fully paid and nonassessable.
 
                                   ARTICLE IV
                      CONDUCT PRIOR TO THE EFFECTIVE TIME
 
    4.1  CONDUCT OF BUSINESS BY BROADCAST.COM.  During the period from the date
of this Agreement and continuing until the earlier of the termination of this
Agreement pursuant to its terms or the Effective Time, broadcast.com and each of
its subsidiaries shall, except to the extent that Yahoo! shall otherwise consent
in writing, carry on its business in the usual, regular and ordinary course, in
substantially the same manner as heretofore conducted and in compliance in all
material respects with all applicable laws and regulations, pay its debts and
taxes when due subject to good faith disputes over such debts or taxes, pay or
perform other material obligations when due, and use its commercially reasonable
efforts consistent with past practices and policies to (i) preserve intact its
present business organization, (ii) keep available the services of its present
officers and employees and (iii) preserve its relationships with customers,
suppliers, licensors, licensees, and others with which it has business dealings.
 
    In addition, except as permitted by the terms of this Agreement, without the
prior written consent of Yahoo!, during the period from the date of this
Agreement and continuing until the earlier of the termination of this Agreement
pursuant to its terms or the Effective Time, broadcast.com shall not do any of
the following and shall not permit its subsidiaries to do any of the following:
 
        (a) Waive any stock repurchase rights, accelerate, amend or change the
    period of exercisability of options or restricted stock, or reprice options
    granted under any employee, consultant, director or other stock plans or
    authorize cash payments in exchange for any options granted under any of
    such plans;
 
        (b) Grant any severance or termination pay to any officer or employee
    except pursuant to written agreements in effect, or policies existing, on
    the date hereof and as previously disclosed in writing to Yahoo!, or adopt
    any new severance plan;
 
        (c) Transfer or license to any person or entity or otherwise extend,
    amend or modify in any material respect any rights to the broadcast.com
    Intellectual Property, other than non-exclusive licenses in the ordinary
    course of business and consistent with past practice;
 
        (d) Declare, set aside or pay any dividends on or make any other
    distributions (whether in cash, stock, equity securities or property) in
    respect of any capital stock or split, combine or reclassify any
 
                                       21
<PAGE>
    capital stock or issue or authorize the issuance of any other securities in
    respect of, in lieu of or in substitution for any capital stock;
 
        (e) Purchase, redeem or otherwise acquire, directly or indirectly, any
    shares of capital stock of broadcast.com or its subsidiaries, except
    repurchases of unvested shares at cost in connection with the termination of
    the employment relationship with any employee pursuant to stock option or
    purchase agreements in effect on the date hereof;
 
        (f) Issue, deliver, sell, authorize, pledge or otherwise encumber any
    shares of capital stock or any securities convertible into shares of capital
    stock, or subscriptions, rights, warrants or options to acquire any shares
    of capital stock or any securities convertible into shares of capital stock,
    or enter into other agreements or commitments of any character obligating it
    to issue any such shares or convertible securities, other than the issuance
    delivery and/or sale of (i) shares of broadcast.com Common Stock pursuant to
    the exercise of stock options or warrants therefor, and (ii) shares of
    broadcast.com Common Stock issuable to participants in the ESPP consistent
    with the terms thereof;
 
        (g) Cause, permit or propose any amendments to its Certificate of
    Incorporation, Bylaws or other charter documents (or similar governing
    instruments of any of its subsidiaries);
 
        (h) Acquire or agree to acquire by merging or consolidating with, or by
    purchasing any equity interest in or a portion of the assets of, or by any
    other manner, any business or any corporation, partnership, association or
    other business organization or division thereof; or otherwise acquire or
    agree to acquire any assets which are material, individually or in the
    aggregate, to the business of broadcast.com or enter into any material joint
    ventures, strategic partnerships or alliances;
 
        (i) Sell, lease, license, encumber or otherwise dispose of any
    properties or assets which are material, individually or in the aggregate,
    to the business of broadcast.com;
 
        (j) Incur any indebtedness for borrowed money or guarantee any such
    indebtedness of another person, issue or sell any debt securities or
    options, warrants, calls or other rights to acquire any debt securities of
    broadcast.com, enter into any "keep well" or other agreement to maintain any
    financial statement condition or enter into any arrangement having the
    economic effect of any of the foregoing other than (i) in connection with
    the financing of ordinary course trade payables consistent with past
    practice or (ii) pursuant to existing credit facilities in the ordinary
    course of business;
 
        (k) Adopt or amend any employee benefit plan or employee stock purchase
    or employee stock option plan, or enter into any employment contract or
    collective bargaining agreement (other than offer letters and letter
    agreements entered into in the ordinary course of business consistent with
    past practice with employees who are terminable "at will"), pay any special
    bonus or special remuneration to any director or employee, or increase the
    salaries or wage rates or fringe benefits (including rights to severance or
    indemnification) of its directors, officers, employees or consultants other
    than in the ordinary course of business, consistent with past practice;
 
        (l) Modify, amend or terminate any material contract or agreement to
    which broadcast.com or any subsidiary thereof is a party or waive, release
    or assign any material rights or claims thereunder;
 
        (m) Enter into any licensing, distribution, sponsorship, advertising,
    merchant program or other similar contracts, agreements, or obligations
    which may not be canceled without penalty by broadcast.com or its
    subsidiaries upon notice of 45 days or less or which provide for payments by
    or to broadcast.com or its subsidiaries in an amount in excess of $50,000
    over the term of the Agreement;
 
        (n) Revalue any of its assets or, except as required by GAAP, make any
    change in accounting methods, principles or practices;
 
                                       22
<PAGE>
        (o) Take any action, or omit to take any action, that would be
    reasonably likely to interfere with Yahoo!'s ability to account for the
    Merger as a pooling of interests, whether or not otherwise permitted by the
    provisions of this Article IV;
 
        (p) Fail to make in a timely manner any filings with the SEC required
    under the Securities Act or the Exchange Act or the rules and regulations
    promulgated thereunder;
 
        (q) Engage in any action with the intent to directly or indirectly
    adversely impact any of the transactions contemplated by this Agreement; or
 
        (r) Agree in writing or otherwise to take any of the actions described
    in Section 4.1 (a) through (q) above.
 
    4.2  CONDUCT OF BUSINESS BY YAHOO!.  During the period from the date of this
Agreement and continuing until the earlier of the termination of this Agreement
pursuant to its terms or the Effective Time, without the prior written consent
of broadcast.com, Yahoo! shall not do any of the following and shall not permit
its subsidiaries to do any of the following:
 
        (a) Cause, permit or propose any amendments to its Articles of
    Incorporation or Bylaws or other charter documents (or similar governing
    instruments of any of its subsidiaries) in a manner that would have an
    adverse impact on broadcast.com's stockholders; PROVIDED that the foregoing
    shall not restrict the ability of Yahoo! to reincorporate in another
    jurisdiction prior to the termination of this Agreement or the Effective
    Time;
 
        (b) Take any action that would be reasonably likely to interfere with
    Yahoo!'s ability to account for the Merger as a pooling of interests,
    whether or not otherwise permitted by this Article IV; or
 
        (c) Fail to make in a timely manner any filings with the SEC required
    under the Securities Act or the Exchange Act or the rules and regulations
    promulgated thereunder.
 
                                   ARTICLE V
                             ADDITIONAL AGREEMENTS
 
    5.1  PROXY STATEMENT/PROSPECTUS; REGISTRATION STATEMENT; OTHER FILINGS.  As
promptly as practicable after the execution of this Agreement, broadcast.com and
Yahoo! will prepare, and file with the SEC, the Proxy Statement/Prospectus and
Yahoo! will prepare and file with the SEC the Registration Statement in which
the Proxy Statement/Prospectus will be included as a prospectus. Each of
broadcast.com and Yahoo! will respond to any comments of the SEC, will use its
respective commercially reasonable efforts to have the Registration Statement
declared effective under the Securities Act as promptly as practicable after
such filing and broadcast.com will cause the Proxy Statement/Prospectus to be
mailed to its stockholders at the earliest practicable time after the
Registration Statement is declared effective by the SEC. As promptly as
practicable after the date of this Agreement, each of broadcast.com and Yahoo!
will prepare and file any other filings required to be filed by it under the
Exchange Act, the Securities Act or any other Federal, foreign or Blue Sky or
related laws relating to the Merger and the transactions contemplated by this
Agreement (the "OTHER FILINGS"). Each of broadcast.com and Yahoo! will notify
the other promptly upon the receipt of any comments from the SEC or its staff or
any other government officials and of any request by the SEC or its staff or any
other government officials for amendments or supplements to the Registration
Statement, the Proxy Statement/Prospectus or any Other Filing or for additional
information and will supply the other with copies of all correspondence between
such party or any of its representatives, on the one hand, and the SEC or its
staff or any other government officials, on the other hand, with respect to the
Registration Statement, the Proxy Statement/Prospectus, the Merger or any Other
Filing. Each of broadcast.com and Yahoo! will cause all documents that it is
responsible for filing with the SEC or other regulatory authorities under this
Section 5.1(a) to comply in all material respects with all applicable
requirements of law and the rules and regulations promulgated thereunder.
Whenever any event occurs which is required to be set forth in an amendment or
supplement to the Proxy Statement/Prospectus, the
 
                                       23
<PAGE>
Registration Statement or any Other Filing, broadcast.com or Yahoo!, as the case
may be, will promptly inform the other of such occurrence and cooperate in
filing with the SEC or its staff or any other government officials, and/or
mailing to stockholders of broadcast.com, such amendment or supplement.
 
    5.2  MEETING OF BROADCAST.COM STOCKHOLDERS.
 
    (a) Promptly after the date hereof, broadcast.com will take all action
necessary in accordance with the Delaware Law and its Certificate of
Incorporation and Bylaws to convene the broadcast.com Stockholders' Meeting to
be held as promptly as practicable after the declaration of effectiveness of the
Registration Statement, for the purpose of voting upon this Agreement and the
Merger. Broadcast.com will use its commercially reasonable efforts to solicit
from its stockholders proxies in favor of the adoption and approval of this
Agreement and the approval of the Merger and will take all other action
necessary or advisable to secure the vote or consent of its stockholders
required by the rules of the NASD or Delaware Law to obtain such approvals.
Notwithstanding anything to the contrary contained in this Agreement,
broadcast.com may adjourn or postpone broadcast.com Stockholders' Meeting to the
extent necessary to ensure that any necessary supplement or amendment to the
Prospectus/Proxy Statement is provided to broadcast.com's stockholders in
advance of a vote on the Merger and this Agreement or, if as of the time for
which broadcast.com Stockholders' Meeting is originally scheduled (as set forth
in the Prospectus/Proxy Statement) there are insufficient shares of
broadcast.com Common Stock represented (either in person or by proxy) to
constitute a quorum necessary to conduct the business of the broadcast.com's
Stockholders' Meeting. Broadcast.com shall ensure that the broadcast.com
Stockholders' Meeting is called, noticed, convened, held and conducted, and
subject to Section 5.2(c) that all proxies solicited by broadcast.com in
connection with the broadcast.com Stockholders' Meeting are solicited, in
compliance with the Delaware Law, its Certificate of Incorporation and Bylaws,
the rules of the NASD and all other applicable legal requirements.
Broadcast.com's obligation to call, give notice of, convene and hold the
broadcast.com Stockholders' Meeting in accordance with this Section 5.2(a) shall
not be limited to or otherwise affected by the commencement, disclosure,
announcement or submission to broadcast.com of any Acquisition Proposal (as
defined in Section 5.4(a)), or by any withdrawal, amendment or modification of
the recommendation of the Board of Directors of broadcast.com with respect to
the Merger.
 
    (b) Subject to Section 5.2(c): (i) the Board of Directors of broadcast.com
shall recommend that broadcast.com's stockholders vote in favor of and adopt and
approve this Agreement and the Merger at the broadcast.com Stockholders'
Meeting; (ii) the Prospectus/Proxy Statement shall include a statement to the
effect that the Board of Directors of broadcast.com has recommended that
broadcast.com's stockholders vote in favor of and adopt and approve this
Agreement and the Merger at the broadcast.com Stockholders' Meeting; and (iii)
neither the Board of Directors of broadcast.com nor any committee thereof shall
withdraw, amend or modify, or propose or resolve to withdraw, amend or modify in
a manner adverse to Yahoo!, the recommendation of the Board of Directors of
broadcast.com that broadcast.com's stockholders vote in favor of and adopt and
approve this Agreement and the Merger.
 
    (c) Nothing in this Agreement shall prevent the Board of Directors of
broadcast.com from withholding, withdrawing, amending or modifying its
recommendation in favor of the Merger if (i) a Superior Offer (as defined
below), or an offer reasonably believed by the Board of Directors of
broadcast.com to be a Superior Offer, is made to broadcast.com and is not
withdrawn, (ii) neither broadcast.com nor any of its representatives shall have
violated any of the restrictions set forth in Section 5.4, and (iii) the Board
of Directors of broadcast.com or any committee thereof concludes in good faith,
after consultation with its outside counsel, that, in light of such Superior
Offer, the withholding, withdrawal, amendment or modification of such
recommendation is required in order for the Board of Directors of broadcast.com
or any committee thereof to comply with its obligations to broadcast.com's
stockholders under applicable law. Nothing contained in this Section 5.2(c)
shall limit broadcast.com's obligation to hold and convene the broadcast.com
Stockholders' Meeting (regardless of whether the recommendation of the Board of
Directors of broadcast.com shall have been withdrawn, amended or modified). For
purposes of this Agreement ("SUPERIOR OFFER") shall mean an unsolicited, bona
fide written offer made by a third party to
 
                                       24
<PAGE>
consummate any of the following transactions: (i) a merger, consolidation,
business combination, recapitalization, liquidation, dissolution or similar
transaction involving broadcast.com pursuant to which the stockholders of
broadcast.com immediately preceding such transaction hold less than 50% of the
equity interest in the surviving or resulting entity of such transaction; (ii) a
sale or other disposition by broadcast.com of assets representing in excess of
50% of the fair market value of broadcast.com's business immediately prior to
such sale, or (iii) the acquisition by any person or group (including by way of
a tender offer or an exchange offer or issuance by broadcast.com), directly or
indirectly, of beneficial ownership or a right to acquire beneficial ownership
of shares representing in excess of 50% of the voting power of the then
outstanding shares of capital stock of broadcast.com, on terms that the Board of
Directors of broadcast.com determines, in its reasonable judgment, after
consultation with its financial advisor, to be more favorable, or is reasonably
likely to be more favorable, to broadcast.com stockholders than the terms of the
Merger; PROVIDED, HOWEVER, that any such offer shall not be deemed to be a
"Superior Offer" if any financing required to consummate the transaction
contemplated by such offer is not committed and is not likely in the judgment of
broadcast.com's Board of Directors to be obtained by such third party on a
timely basis.
 
    5.3  CONFIDENTIALITY; ACCESS TO INFORMATION.
 
    (a) The parties acknowledge that broadcast.com and Yahoo! have previously
executed a Confidentiality Agreement (the "CONFIDENTIALITY AGREEMENT"), which
Confidentiality Agreement will continue in full force and effect in accordance
with its terms.
 
    (b) Broadcast.com will afford Yahoo! and its accountants, counsel and other
representatives reasonable access during normal business hours to the
properties, books, records and personnel of broadcast.com during the period
prior to the Effective Time to obtain all information concerning the business,
including the status of product development efforts, properties, results of
operations and personnel of broadcast.com, as Yahoo! may reasonably request.
Yahoo! will afford broadcast.com and its representatives reasonable access to
information concerning Yahoo!'s business that broadcast.com may reasonably
request in order to permit, and solely for the purpose of permitting,
broadcast.com to confirm the accuracy of the representations and warranties made
by Yahoo! in Article III. No information or knowledge obtained by Yahoo! or
broadcast.com in any investigation pursuant to this Section 5.3 will affect or
be deemed to modify any representation or warranty contained herein or the
conditions to the obligations of the parties to consummate the Merger.
 
    5.4  NO SOLICITATION.
 
    (a) From and after the date of this Agreement until the Effective Time or
termination of this Agreement pursuant to Article VII, broadcast.com and its
subsidiaries will not, nor will they authorize or permit any of their respective
officers, directors, affiliates or employees or any investment banker, attorney
or other advisor or representative retained by any of them to, directly or
indirectly, (i) solicit, initiate, encourage or induce the making, submission or
announcement of any Acquisition Proposal, (ii) participate in any discussions or
negotiations regarding, or furnish to any person any non-public information with
respect to, or take any other action to facilitate any inquiries or the making
of any proposal that constitutes or may reasonably be expected to lead to, any
Acquisition Proposal, (iii) engage in discussions with any person with respect
to any Acquisition Proposal, except as to the existence of these provisions,
(iv) subject to Section 5.2(c), approve, endorse or recommend any Acquisition
Proposal or (v) enter into any letter of intent or similar document or any
contract, agreement or commitment contemplating or otherwise relating to any
Acquisition Transaction; PROVIDED, HOWEVER, that prior to the approval of this
Agreement by the required broadcast.com stockholder vote, this Section 5.4(a)
shall not prohibit broadcast.com from furnishing nonpublic information regarding
broadcast.com and its subsidiaries to, entering into a confidentiality agreement
with or entering into discussions with, any person or group in response to a
Superior Offer submitted by such person or group (and not withdrawn) if (1)
neither broadcast.com nor any representative of broadcast.com and its
subsidiaries shall have violated any of the restrictions set forth in
 
                                       25
<PAGE>
this Section 5.4, (2) the Board of Directors of broadcast.com concludes in good
faith, after consultation with its outside legal counsel, that such action is
required in order for the Board of Directors of broadcast.com to comply with its
fiduciary obligations to broadcast.com's stockholders under applicable law, (3)
prior to furnishing any such nonpublic information to, or entering into
discussions with, such person or group, broadcast.com gives Yahoo! written
notice of the identity of such person or group and of broadcast.com's intention
to furnish nonpublic information to, or enter into discussions with, such person
or group and broadcast.com receives from such person or group an executed
confidentiality agreement containing customary limitations on the use and
disclosure of all nonpublic written and oral information furnished to such
person or group by or on behalf of broadcast.com, and (4) contemporaneously with
furnishing any such nonpublic information to such person or group, broadcast.com
furnishes such nonpublic information to Yahoo! (to the extent such nonpublic
information has not been previously furnished by broadcast.com to Yahoo!);
PROVIDED, FURTHER, that nothing herein shall prevent the Board of Directors of
broadcast.com from taking, and disclosing to broadcast.com's stockholders, a
position contemplated by Rules 14d-9 and 14e-2 promulgated under the Exchange
Act. Broadcast.com and its subsidiaries will immediately cease any and all
existing activities, discussions or negotiations with any parties conducted
heretofore with respect to any Acquisition Proposal. Without limiting the
foregoing, it is understood that any violation of the restrictions set forth in
the preceding two sentences by any officer, director or employee of
broadcast.com or any of its subsidiaries or any investment banker, attorney or
other advisor or representative of broadcast.com or any of its subsidiaries
shall be deemed to be a breach of this Section 5.4 by broadcast.com. In addition
to the foregoing, broadcast.com shall provide Yahoo! with at least two (2)
business days or forty-eight (48) hours prior written notice of a meeting of
broadcast.com's Board of Directors at which broadcast.com's Board of Directors
is reasonably expected to recommend a Superior Offer to its stockholders and
together with such notice a copy of the documentation relating to such Superior
Offer that exists at such time.
 
    For purposes of this Agreement, "ACQUISITION PROPOSAL" shall mean any bona
fide offer or proposal (other than an offer or proposal by Yahoo!) relating to
any Acquisition Transaction. For the purposes of this Agreement, "ACQUISITION
TRANSACTION" shall mean any transaction or series of related transactions other
than the transactions contemplated by this Agreement involving: (A) any
acquisition or purchase from broadcast.com by any person or "group" (as defined
under Section 13(d) of the Exchange Act and the rules and regulations
thereunder) of more than a 30% interest in the total outstanding voting
securities of broadcast.com or any of its subsidiaries or any tender offer or
exchange offer that if consummated would result in any person or "group" (as
defined under Section 13(d) of the Exchange Act and the rules and regulations
thereunder) beneficially owning 30% or more of the total outstanding voting
securities of broadcast.com or any of its subsidiaries or any merger,
consolidation, business combination or similar transaction involving
broadcast.com pursuant to which the stockholders of broadcast.com immediately
preceding such transaction hold less than 70% of the equity interests in the
surviving or resulting entity of such transaction; (B) any sale, lease (other
than in the ordinary course of business), exchange, transfer, license (other
than in the ordinary course of business), acquisition or disposition of more
than 50% of the assets of broadcast.com; or (C) any liquidation or dissolution
of broadcast.com.
 
    (b) In addition to the obligations of broadcast.com set forth in paragraph
(a) of this Section 5.4, broadcast.com as promptly as practicable shall advise
Yahoo! orally and in writing of any request for non-public information which
broadcast.com reasonably believes would lead to an Acquisition Proposal or of
any Acquisition Proposal, or any inquiry with respect to or which broadcast.com
reasonably should believe would lead to any Acquisition Proposal, the material
terms and conditions of such Acquisition Proposal (to the extent known), and the
identity of the person or group making any such request, Acquisition Proposal or
inquiry. Broadcast.com will keep Yahoo! informed in all material respects of any
material amendments or proposed amendments to any such Acquisition Proposal.
 
                                       26
<PAGE>
    5.5  PUBLIC DISCLOSURE.  Yahoo! and broadcast.com will consult with each
other, and to the extent practicable, agree, before issuing any press release or
otherwise making any public statement with respect to the Merger, this Agreement
or an Acquisition Proposal and will not issue any such press release or make any
such public statement prior to such consultation, except as may be required by
law or any listing agreement with a national securities exchange. The parties
have agreed to the text of the joint press release announcing the execution of
this Agreement.
 
    5.6  REASONABLE EFFORTS; NOTIFICATION.
 
    (a) Upon the terms and subject to the conditions set forth in this
Agreement, each of the parties agrees to use all reasonable efforts to take, or
cause to be taken, all actions, and to do, or cause to be done, and to assist
and cooperate with the other parties in doing, all things necessary, proper or
advisable to consummate and make effective, in the most expeditious manner
practicable, the Merger and the other transactions contemplated by this
Agreement, including using reasonable efforts to accomplish the following: (i)
the taking of all reasonable acts necessary to cause the conditions precedent
set forth in Article VI to be satisfied, (ii) the obtaining of all necessary
actions or nonactions, waivers, consents, approvals, orders and authorizations
from Governmental Entities and the making of all necessary registrations,
declarations and filings (including registrations, declarations and filings with
Governmental Entities, if any) and the taking of all reasonable steps as may be
necessary to avoid any suit, claim, action, investigation or proceeding by any
Governmental Entity, (iii) the obtaining of all necessary consents, approvals or
waivers from third parties, (iv) the defending of any suits, claims, actions,
investigations or proceedings, whether judicial or administrative, challenging
this Agreement or the consummation of the transactions contemplated hereby,
including seeking to have any stay or temporary restraining order entered by any
court or other Governmental Entity vacated or reversed, and (v) the execution or
delivery of any additional instruments necessary to consummate the transactions
contemplated by, and to fully carry out the purposes of, this Agreement. In
connection with and without limiting the foregoing, broadcast.com and its Board
of Directors shall, if any state takeover statute or similar statute or
regulation is or becomes applicable to the Merger, this Agreement or any of the
transactions contemplated by this Agreement, use all reasonable efforts to
ensure that the Merger and the other transactions contemplated by this Agreement
may be consummated as promptly as practicable on the terms contemplated by this
Agreement and otherwise to minimize the effect of such statute or regulation on
the Merger, this Agreement and the transactions contemplated hereby.
Notwithstanding anything herein to the contrary, nothing in this Agreement shall
be deemed to require Yahoo! or any of its affiliates to make proposals, execute
or carry out agreements or submit to orders providing for the sale or other
disposition or holding separate (through the establishment of a trust or
otherwise) of any assets or categories of assets of Yahoo!, any of its
affiliates or broadcast.com or the holding separate of the shares of
broadcast.com Common Stock or imposing or seeking to impose any limitation on
the ability of Yahoo! or any of its subsidiaries or affiliates to conduct their
business or own such assets or to acquire, hold or exercise full rights of
ownership of the shares of broadcast.com Common Stock.
 
    (b) Broadcast.com shall give prompt notice to Yahoo! of any representation
or warranty made by it contained in this Agreement becoming untrue or
inaccurate, or any failure of broadcast.com to comply with or satisfy in any
material respect any covenant, condition or agreement to be complied with or
satisfied by it under this Agreement, in each case, such that the conditions set
forth in Section 6.3(a) or 6.3(b) would not be satisfied; PROVIDED, HOWEVER,
that no such notification shall affect the representations, warranties,
covenants or agreements of the parties or the conditions to the obligations of
the parties under this Agreement.
 
    (c) Yahoo! shall give prompt notice to broadcast.com of any representation
or warranty made by it or Merger Sub contained in this Agreement becoming untrue
or inaccurate, or any failure of Yahoo! or Merger Sub to comply with or satisfy
in any material respect any covenant, condition or agreement to be complied with
or satisfied by it under this Agreement, in each case, such that the conditions
set forth in Section 6.2(a) or 6.2(b) would not be satisfied; PROVIDED, HOWEVER,
that no such notification shall affect the
 
                                       27
<PAGE>
representations, warranties, covenants or agreements of the parties or the
conditions to the obligations of the parties under this Agreement.
 
    5.7  THIRD PARTY CONSENTS.  As soon as practicable following the date
hereof, Yahoo! and broadcast.com will each use its commercially reasonable
efforts to obtain any consents, waivers and approvals under any of its or its
subsidiaries' respective agreements, contracts, licenses or leases required to
be obtained in connection with the consummation of the transactions contemplated
hereby.
 
    5.8  STOCK OPTIONS AND ESPP.
 
    (a) At the Effective Time, each outstanding option to purchase shares of
broadcast.com Common Stock (each a "BROADCAST.COM STOCK OPTION") under the
broadcast.com Stock Option Plans, whether or not exercisable, will be assumed by
Yahoo!. Each broadcast.com Stock Option so assumed by Yahoo! under this
Agreement will continue to have, and be subject to, the same terms and
conditions set forth in the applicable broadcast.com Stock Option Plan
immediately prior to the Effective Time (including, without limitation, any
repurchase rights or vesting provisions), except that (i) each broadcast.com
Stock Option will be exercisable (or will become exercisable in accordance with
its terms) for that number of whole shares of Yahoo! Common Stock equal to the
product of the number of shares of broadcast.com Common Stock that were issuable
upon exercise of such broadcast.com Stock Option immediately prior to the
Effective Time multiplied by the Exchange Ratio, rounded down to the nearest
whole number of shares of Yahoo! Common Stock and (ii) the per share exercise
price for the shares of Yahoo! Common Stock issuable upon exercise of such
assumed broadcast.com Stock Option will be equal to the quotient determined by
dividing the exercise price per share of broadcast.com Common Stock at which
such broadcast.com Stock Option was exercisable immediately prior to the
Effective Time by the Exchange Ratio, rounded up to the nearest whole cent.
 
    (b) It is intended that broadcast.com Stock Options assumed by Yahoo! shall
qualify following the Effective Time as incentive stock options as defined in
Section 422 of the Code to the extent broadcast.com Stock Options qualified as
incentive stock options immediately prior to the Effective Time and the
provisions of this Section 5.8 shall be applied consistent with such intent.
 
    (c) Broadcast.com shall take all actions necessary pursuant to the terms of
the ESPP in order to accelerate the exercise date of the offering period under
such plan which includes the Effective Time (the "CURRENT OFFERING PERIOD") such
that a new exercise date for such offering period shall occur prior to the
Effective Time and shares shall be purchased by ESPP participants prior to the
Effective Time. The Current Offering Period shall expire immediately following
such new exercise date, and the ESPP shall terminate immediately prior to the
Effective Time. Subsequent to such new exercise date, broadcast.com shall take
no action, pursuant to the terms of the ESPP, to commence any new offering
period.
 
    (d) Broadcast.com shall take all necessary action to cause any 401(k) plan
sponsored or maintained by broadcast.com to be terminated one day prior to the
Closing Date.
 
    (e) Prior to the Effective Time, broadcast.com agrees to make such
modifications to broadcast.com's 1996 Non-Employee Directors Stock Option Plan
(relating to exercise of options following termination of service with
broadcast.com) as shall be reasonably requested by Yahoo! in order to permit the
business combination contemplated by the Merger to be accounted for as a pooling
of interests.
 
    (f) The Board of Directors of Yahoo! shall, to the extent permitted by
applicable law, take or cause to be taken all actions necessary to obtain
approval in the form required by Rule 16b-3 of the Exchange Act so that, with
respect to persons who will or may become officers or directors of Yahoo!, the
transactions relating to the Merger that may be considered acquisitions under
such Rule for such persons will be exempt from Section 16 of the Exchange Act.
 
    5.9  FORM S-8.  Yahoo! agrees to file a registration statement on Form S-8
for the shares of Yahoo! Common Stock issuable with respect to assumed
broadcast.com Stock Options as soon as is reasonably
 
                                       28
<PAGE>
practicable after the Effective Time, and in any event within 30 days after the
Effective Time, and intends to maintain the effectiveness of such registration
statement thereafter for so long as any of such options or other rights remain
outstanding.
 
    5.10  INDEMNIFICATION.
 
    (a) From and after the Effective Time, Yahoo! will cause the Surviving
Corporation to fulfill and honor in all respects the obligations of
broadcast.com pursuant to any indemnification agreements between broadcast.com
and its directors and officers as of the Effective Time (the "INDEMNIFIED
PARTIES") and any indemnification provisions under broadcast.com's Certificate
of Incorporation or Bylaws as in effect on the date hereof. The Certificate of
Incorporation and Bylaws of the Surviving Corporation will contain provisions
with respect to exculpation and indemnification that are at least as favorable
to the Indemnified Parties as those contained in the Certificate of
Incorporation and Bylaws of broadcast.com as in effect on the date hereof, which
provisions will not be amended, repealed or otherwise modified for a period of
six years from the Effective Time in any manner that would adversely affect the
rights thereunder of individuals who, immediately prior to the Effective Time,
were directors, officers, employees or agents of broadcast.com, unless such
modification is required by law.
 
    (b) For a period of three years after the Effective Time, Yahoo! will cause
the Surviving Corporation to use its commercially reasonable efforts to maintain
in effect, if available, directors' and officers' liability insurance covering
those persons who are currently covered by broadcast.com's directors' and
officers' liability insurance policy on terms comparable to those applicable to
the current directors and officers of broadcast.com; PROVIDED, HOWEVER, that in
no event will Yahoo! or the Surviving Corporation be required to expend in
excess of 150% of the annual premium currently paid by broadcast.com for such
coverage (or such coverage as is available for such 150% of such annual
premium).
 
    (c) This Section 5.10 shall survive the consummation of the Merger, is
intended to benefit broadcast.com, the Surviving Corporation and each
indemnified party, shall be binding on all successors and assigns of the
Surviving Corporation and Yahoo!, and shall be enforceable by the indemnified
parties.
 
    5.11  NASDAQ LISTING.  Yahoo! agrees to authorize for listing on the Nasdaq
Stock Market the shares of Yahoo! Common Stock issuable, and those required to
be reserved for issuance, in connection with the Merger, upon official notice of
issuance
 
    5.12  AFFILIATE AGREEMENTS.  In addition to those broadcast.com Affiliate
Agreements executed and delivered to Yahoo! concurrently with the execution of
this Agreement, broadcast.com will use its commercially reasonable efforts to
deliver or cause to be delivered to Yahoo!, as promptly as practicable on or
following the date hereof, from each additional broadcast.com Affiliate an
executed broadcast.com Affiliate Agreement, each of which will be in full force
and effect as of the Effective Time. Yahoo! will use its commercially reasonable
efforts to deliver or cause to be delivered, as promptly as practicable
following the date hereof, from each Yahoo! Affiliate an executed affiliate
agreement in substantially the form attached hereto as EXHIBIT D (the "YAHOO!
AFFILIATE AGREEMENT"), each of which will be in full force and effect as of the
Effective Time. Yahoo! will be entitled to place appropriate legends on the
certificates evidencing any Yahoo! Common Stock to be received by a
broadcast.com Affiliate pursuant to the terms of this Agreement, and to issue
appropriate stop transfer instructions to the transfer agent for the Yahoo!
Common Stock, consistent with the terms of the broadcast.com Affiliate
Agreement.
 
    5.13  COMPANY STOCK OPTION.
 
    (a)  GRANT OF BROADCAST.COM STOCK OPTION.  Subject to the terms of Section
7.3(d), broadcast.com hereby grants to Yahoo! an irrevocable option (the
"BROADCAST.COM STOCK OPTION") to purchase for $130.02 per share (the "EXERCISE
PRICE") in cash up to 7,333,300 shares of broadcast.com Common Stock.
 
    (b)  TERM OF BROADCAST.COM STOCK OPTION.  Yahoo! may exercise the
broadcast.com Stock Option, in whole or in part, at any time or from time to
time on the date (the "EXERCISE COMMENCEMENT DATE") and
 
                                       29
<PAGE>
from the time contemporaneously with the time at which a Triggering Event (as
such term is defined in Section 7.1) shall have occurred or on which this
Agreement shall be terminated in the circumstances contemplated by Section
7.1(d), until the day (the "OPTION TERMINATION DATE") which is the earlier of
(i) the Effective Time or (ii) 270 days after the termination of this Agreement.
 
    (c)  CONDITIONS TO PURCHASE.  Yahoo! may purchase shares of broadcast.com
Common Stock pursuant to the broadcast.com Stock Option only if all of the
following conditions are satisfied: (i) Yahoo! is not at the time of purchase in
material breach of its obligations under this Agreement, (ii) no preliminary or
permanent injunction or other order, decree or ruling against the sale or
delivery of the shares of broadcast.com Common Stock issued by any federal or
state court of competent jurisdiction in the United States is in effect at such
time, and (iii) any applicable waiting period under the HSR Act shall have
expired or been terminated at or prior to such time.
 
    (d)  EXERCISE OF STOCK OPTION.  If Yahoo! wishes to exercise the
broadcast.com Stock Option, it shall do so by giving broadcast.com notice to
such effect, specifying the number of Shares to be purchased and a place and
date not earlier than one business day nor later than ten business days from the
date such notice is given for the closing of the purchase. If any such closing
cannot be consummated on the date specified by Yahoo! in its notice of election
to exercise the broadcast.com Stock Option because any condition to the purchase
of shares of broadcast.com Common Stock has not been satisfied or as a result of
any restriction arising under any applicable law or regulation, the date for
such closing shall be on such date within five days following the satisfaction
of all such conditions and the cessation of all such restrictions as Yahoo! may
specify. Yahoo! represents and warrants to broadcast.com that any shares of
broadcast.com Common Stock acquired upon exercise of the broadcast.com Stock
Option will be acquired for Yahoo!'s own account, and will not be, and the
broadcast.com Stock Option is not being, acquired by Yahoo! with a view to the
distribution thereof in violation of any applicable provision of the Securities
Act. Yahoo! has such knowledge and experience in business and financial matters
as to be capable of utilizing the information which is available to Yahoo! to
evaluate the merits and risks of an investment by Yahoo! in the broadcast.com
Common Stock and Yahoo! is able to bear the economic risks of any investment in
the broadcast.com Common Stock which Yahoo! may acquire upon exercise of the
broadcast.com Stock Option.
 
    (e)  PAYMENT AND DELIVERY OF SHARES.  At any closing in connection with the
broadcast.com Stock Option, (i) Yahoo! shall make payment to broadcast.com of
the aggregate purchase price for the shares of broadcast.com Common Stock to be
purchased by delivery to broadcast.com of a certified, cashier's or bank check
payable to the order of broadcast.com or, if mutually agreed, by wire transfer
of funds to an account designated by broadcast.com, and (ii) broadcast.com shall
deliver to Yahoo! a certificate or certificates representing the shares so
purchased, registered in the name of Yahoo! or its designee. Certificates for
broadcast.com Common Stock delivered at any closing may be endorsed with a
restrictive legend that shall read substantially as follows: "The transfer of
the shares represented by this certificate is subject to certain provisions of
an agreement between the registered holder hereof and broadcast.com, a copy of
which agreement is on file at the principal office of broadcast.com, and to
resale restrictions arising under the Securities Act of 1933, as amended. A copy
of the aforementioned agreement will be mailed to the holder without charge
promptly after receipt by broadcast.com of a written request therefor." In
addition, the certificates shall bear any other legend as may be required by
applicable law.
 
    (f)  CERTAIN ADJUSTMENTS.  In the event of any change in broadcast.com's
capital stock by reason of stock dividends, stock splits, mergers,
consolidations, recapitalizations, combinations, conversions, exchanges of
shares, extraordinary or liquidating dividends, or other changes in the
corporate or capital structure of broadcast.com which would have the effect of
diluting or changing Yahoo!'s rights hereunder, the number and kind of shares of
broadcast.com Common Stock subject to the broadcast.com Stock Option and the
purchase price per Share (but not the total purchase price) shall be
appropriately and equitably adjusted so that Yahoo! shall receive upon exercise
of the broadcast.com Stock Option the number and class of shares of
broadcast.com Common Stock or other securities or property that Yahoo!
 
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<PAGE>
would have received in respect of the shares purchasable upon exercise of the
broadcast.com Stock Option if the broadcast.com Stock Option had been exercised
immediately prior to such event.
 
    (g)  SURRENDER RIGHT.  At any time or from time to time after the Exercise
Commencement Date and prior to the Option Termination Date, Yahoo! may, at its
election, upon two business days' notice to broadcast.com, surrender all or a
part of the broadcast.com Stock Option to broadcast.com, in which event
broadcast.com shall pay to Yahoo!, on the day of each such surrender and in
consideration thereof, against tender by Yahoo! of an instrument evidencing such
surrender, an amount in cash per share of broadcast.com Common Stock the rights
to which are surrendered equal to (i) the closing sale price of the
broadcast.com's Common Stock on the Nasdaq Stock Market on the date of surrender
(or the closing price as reported by any other applicable securities exchange if
not listed on the Nasdaq Stock Market), or if not actively traded, the fair
market value as determined by investment bankers chosen by Yahoo! over (ii) the
Exercise Price. Upon exercise of its right to surrender the broadcast.com Stock
Option or any portion thereof and the receipt by Yahoo! of cash pursuant to this
Section 5.13(g), any and all rights of Yahoo! to purchase shares of
broadcast.com Common Stock with respect to the portion of the broadcast.com
Stock Option surrendered pursuant to this Section shall be terminated.
 
    (h)  LISTING AND RESERVATION OF SHARES; NOTIFICATION OF RECORD DATES.
 
    (i) Promptly after the date hereof, and from time to time thereafter if
necessary, broadcast.com will apply to list all of the shares of broadcast.com
Common Stock subject to the broadcast.com Stock Option on the Nasdaq Stock
Market and will use its best efforts to obtain approval of such listing as soon
as practicable.
 
    (ii) Broadcast.com has taken all necessary corporate and other action to
authorize and reserve and to permit it to issue, and at all times from the date
hereof until such time as the obligation to deliver shares of broadcast.com
Common Stock upon the exercise of the broadcast.com Stock Option terminates,
will have reserved for issuance, upon any exercise of the broadcast.com Stock
Option, the number of shares of broadcast.com Common Stock subject to the
broadcast.com Stock Option (less the number of shares previously issued upon any
partial exercise of the broadcast.com Stock Option or as to which the
broadcast.com Stock Option may no longer be exercised).
 
   (iii) Broadcast.com shall give Yahoo! at least ten days' prior written notice
before setting the record date for determining the holders of record of shares
of broadcast.com Common Stock entitled to notice of, or to vote on, any matter,
to receive any dividend or distribution or to participate in any rights offering
or other matter, or to receive any other benefit or right, with respect to
shares of broadcast.com Common Stock.
 
    (i)  REGISTRATION OF THE SHARES.
 
    (i) If Yahoo! requests broadcast.com in writing to register under the
Securities Act any of the shares of broadcast.com Common Stock owned by Yahoo!,
broadcast.com will use its best efforts to cause the offering of the shares so
specified in such request to be registered as soon as practicable so as to
permit the sale or other distribution by Yahoo! of the shares specified in its
request (and to keep such registration in effect for a period of at least 90
days), and in connection therewith prepare and file as promptly as reasonably
possible (but in no event later than 60 days from receipt of Yahoo!'s request) a
registration statement under the Securities Act to effect such registration on
an appropriate form, which would permit the sale of the shares of broadcast.com
Common Stock by Yahoo! in the manner specified by Yahoo! in its request.
Broadcast.com shall not be obligated to make effective more than two
registration statements pursuant to the foregoing sentence. Upon written notice
to Yahoo!, broadcast.com may postpone effecting a registration pursuant to this
Section 5.13 on one occasion during any period of six consecutive months for a
reasonable time specified in the notice but not exceeding 90 days (which period
may not be extended or renewed) if (1) an investment banking firm of recognized
national standing shall advise broadcast.com and Yahoo! in writing that
effecting the registration would materially and adversely affect an offering of
 
                                       31
<PAGE>
securities of broadcast.com the preparation of which had then been commenced, or
(2) broadcast.com is in possession of material non-public information the
disclosure of which during the period specified in such notice broadcast.com
believes, in its reasonable judgment, would not be in the best interests of
broadcast.com. The obligations of broadcast.com under this Section 5.13(i)(i)
shall terminate at such time as Yahoo! may sell all shares of broadcast.com
Common Stock without restriction under Rule 144 (k).
 
    (ii) Broadcast.com shall notify Yahoo! in writing not less than ten days
prior to filing a registration statement under the Securities Act (other than a
filing on Form S-4 or S-8) with respect to any shares of broadcast.com Common
Stock of broadcast.com's intention so to file. If Yahoo! wishes to have any
portion of its shares of broadcast.com Common Stock included in such
registration statement, it shall advise broadcast.com in writing to that effect
within two business days following receipt of such notice, and broadcast.com
will thereupon include the number of shares of broadcast.com Common Stock
indicated by Yahoo! under such Registration Statement. If such registration
involves an underwritten public offering and the managing underwriter shall
advise broadcast.com and Yahoo! that in its view the number of shares of
broadcast.com Common Stock requested to be included in such registration
(including any securities which broadcast.com proposes to be included) exceeds
the largest number of shares which can be sold without having an adverse effect
on such offering, including the price at which such shares can be sold (the
"MAXIMUM OFFERING SIZE"), broadcast.com will include in such registration, up to
the Maximum Offering Size, first, all securities proposed to be registered by
broadcast.com, and second, shares of broadcast.com Common Stock requested to be
registered by Yahoo!.
 
   (iii) Broadcast.com shall pay all fees and expenses in connection with any
registration pursuant to this Section 5.13 other than underwriting discounts and
commissions to brokers or dealers and shall indemnify Yahoo!, its officers,
directors, agents, other controlling persons and any underwriters retained by
Yahoo! in connection with such sale of such shares of broadcast.com Common Stock
in the customary way, and agree to customary contribution provisions with such
persons, with respect to claims, damages, losses and liabilities (and any
expenses relating thereto) arising (or to which Yahoo!, its officers, directors,
agents, other controlling persons or underwriters may be subject) in connection
with any such offer or sale under the federal securities laws or otherwise,
except for information furnished in writing by Yahoo! or its underwriters to
broadcast.com. Yahoo! and its underwriters, respectively, shall indemnify
broadcast.com to the same extent with respect to information furnished in
writing to broadcast.com by Yahoo! and such underwriters.
 
    5.14  LETTER OF BROADCAST.COM'S ACCOUNTANTS.  Broadcast.com shall use all
reasonable efforts to cause to be delivered to Yahoo! a letter of
PricewaterhouseCoopers LLP, dated no more than two (2) business days before the
date on which the Registration Statement becomes effective (and reasonably
satisfactory in form and substance to Yahoo!), that is customary in scope and
substance for letters delivered by independent public accountants in connection
with registration statements similar to the Registration Statement.
 
                                   ARTICLE VI
                            CONDITIONS TO THE MERGER
 
    6.1  CONDITIONS TO OBLIGATIONS OF EACH PARTY TO EFFECT THE MERGER.  The
respective obligations of each party to this Agreement to effect the Merger
shall be subject to the satisfaction at or prior to the Closing Date of the
following conditions:
 
        (a)  BROADCAST.COM STOCKHOLDER APPROVAL.  This Agreement shall have been
    approved and adopted, and the Merger shall have been duly approved, by the
    requisite vote under applicable law, by the stockholders of broadcast.com.
 
                                       32
<PAGE>
        (b)  REGISTRATION STATEMENT EFFECTIVE; PROXY STATEMENT.  The SEC shall
    have declared the Registration Statement effective. No stop order suspending
    the effectiveness of the Registration Statement or any part thereof shall
    have been issued and no proceeding for that purpose, and no similar
    proceeding in respect of the Proxy Statement/Prospectus, shall have been
    initiated or threatened in writing by the SEC.
 
        (c)  NO ORDER; HSR ACT.  No Governmental Entity shall have enacted,
    issued, promulgated, enforced or entered any statute, rule, regulation,
    executive order, decree, injunction or other order (whether temporary,
    preliminary or permanent) which is in effect and which has the effect of
    making the Merger illegal or otherwise prohibiting consummation of the
    Merger. All waiting periods, if any, under the HSR Act relating to the
    transactions contemplated hereby will have expired or terminated early and
    all material foreign antitrust approvals required to be obtained prior to
    the Merger in connection with the transactions contemplated hereby shall
    have been obtained.
 
        (d)  TAX OPINIONS.  Yahoo! and broadcast.com shall each have received
    written opinions from their respective tax counsel (Venture Law Group, A
    Professional Corporation, and Gibson, Dunn & Crutcher LLP, respectively), in
    form and substance reasonably satisfactory to them, to the effect that the
    Merger will constitute a reorganization within the meaning of Section 368(a)
    of the Code and such opinions shall not have been withdrawn; PROVIDED,
    HOWEVER, that if the counsel to either Yahoo! or broadcast.com does not
    render such opinion, this condition shall nonetheless be deemed to be
    satisfied with respect to such party if counsel to the other party renders
    such opinion to such party. The parties to this Agreement agree to make
    reasonable representations as requested by such counsel for the purpose of
    rendering such opinions.
 
        (e)  NASDAQ LISTING.  The shares of Yahoo! Common Stock to be issued in
    the Merger shall have been approved for listing on the Nasdaq Stock Market.
 
        (f)  OPINION OF ACCOUNTANTS.  Yahoo! shall have received letters from
    PricewaterhouseCoopers LLP, dated within two (2) business days prior to the
    Effective Time, regarding that firm's concurrence with Yahoo!'s management's
    and broadcast.com's management's conclusions as to the appropriateness of
    pooling of interest accounting for the Merger under Accounting Principles
    Board Opinion No. 16, if the Merger is consummated in accordance with this
    Agreement; provided, however, that this condition shall be deemed waived by
    broadcast.com in the event that any action taken by, or omitted to be taken
    by, broadcast.com or any of its stockholders, employees or affiliates shall
    have been the proximate cause of the inability of Yahoo! to account for the
    Merger as a pooling of interests.
 
    6.2  ADDITIONAL CONDITIONS TO OBLIGATIONS OF BROADCAST.COM.  The obligation
of broadcast.com to consummate and effect the Merger shall be subject to the
satisfaction at or prior to the Closing Date of each of the following
conditions, any of which may be waived, in writing, exclusively by
broadcast.com:
 
        (a)  REPRESENTATIONS AND WARRANTIES.  Each representation and warranty
    of Yahoo! and Merger Sub contained in this Agreement (i) shall have been
    true and correct in all material respects as of the date of this Agreement,
    and (ii) shall be true and correct on and as of the Closing Date with the
    same force and effect as if made on the Closing Date except (A) in each
    case, or in the aggregate, as does not constitute a Material Adverse Effect
    on Yahoo! and Merger Sub, (B) for changes contemplated by this Agreement,
    and (C) for those representations and warranties which address matters only
    as of a particular date (which representations shall have been true and
    correct except as does not constitute a Material Adverse Effect on Yahoo!
    and Merger Sub as of such particular date) (it being understood that, for
    purposes of determining the accuracy of such representations and warranties
    for purposes of clause (ii), (1) all "Material Adverse Effect"
    qualifications and other qualifications based on the word "material" or
    similar phrases contained in such representations and warranties shall be
    disregarded, and (2) any update of or modification to the Yahoo! Disclosure
    Letter made or purported to have been made after the date of this Agreement
    shall be disregarded). Broadcast.com shall have received
 
                                       33
<PAGE>
    a certificate with respect to the foregoing signed on behalf of Yahoo! by an
    authorized officer of Yahoo!.
 
        (b)  AGREEMENTS AND COVENANTS.  Yahoo! and Merger Sub shall have
    performed or complied in all material respects with all agreements and
    covenants required by this Agreement to be performed or complied with by
    them on or prior to the Closing Date, and broadcast.com shall have received
    a certificate to such effect signed on behalf of Yahoo! by an authorized
    officer of Yahoo!.
 
    6.3  ADDITIONAL CONDITIONS TO THE OBLIGATIONS OF YAHOO! AND MERGER SUB.  The
obligations of Yahoo! and Merger Sub to consummate and effect the Merger shall
be subject to the satisfaction at or prior to the Closing Date of each of the
following conditions, any of which may be waived, in writing, exclusively by
Yahoo!:
 
        (a)  REPRESENTATIONS AND WARRANTIES.  Each representation and warranty
    of broadcast.com contained in this Agreement (i) shall have been true and
    correct in all material respects as of the date of this Agreement, and (ii)
    shall be true and correct on and as of the Closing Date with the same force
    and effect as if made on and as of the Closing Date except (A) in each case,
    or in the aggregate, as does not constitute a Material Adverse Effect on
    broadcast.com, (B) for changes contemplated by this Agreement, and (C) for
    those representations and warranties which address matters only as of a
    particular date (which representations shall have been true and correct
    except as does not constitute a Material Adverse Effect on broadcast.com as
    of such particular date) (it being understood that, for purposes of
    determining the accuracy of such representations and warranties, (1) all
    "Material Adverse Effect" qualifications and other qualifications based on
    the word "material" or similar phrases contained in such representations and
    warranties shall be disregarded, and (2) any update of or modification to
    the broadcast.com Disclosure Letter made or purported to have been made
    after the date of this Agreement shall be disregarded). Yahoo! shall have
    received a certificate with respect to the foregoing signed on behalf of
    broadcast.com by an authorized officer of broadcast.com.
 
        (b)  AGREEMENTS AND COVENANTS.  Broadcast.com shall have performed or
    complied in all material respects with all agreements and covenants required
    by this Agreement to be performed or complied with by it at or prior to the
    Closing Date, and Yahoo! shall have received a certificate to such effect
    signed on behalf of broadcast.com by the Chief Executive Officer and the
    Chief Financial Officer of broadcast.com.
 
        (c)  AFFILIATE AGREEMENTS.  Each of the broadcast.com Affiliates shall
    have entered into the broadcast.com Affiliate Agreement and each of such
    agreements will be in full force and effect as of the Effective Time.
 
        (d)  NONCOMPETITION AGREEMENTS.  Each of the Noncompetition Agreements
    entered into concurrently with the execution of this Agreement shall remain
    in full force and effect.
 
                                  ARTICLE VII
                       TERMINATION, AMENDMENT AND WAIVER
 
    7.1  TERMINATION.  This Agreement may be terminated at any time prior to the
Effective Time, whether before or after the requisite approvals of the
stockholders of broadcast.com or Yahoo!:
 
        (a) by mutual written consent duly authorized by the Boards of Directors
    of Yahoo! and broadcast.com;
 
        (b) by either broadcast.com or Yahoo! if the Merger shall not have been
    consummated by October 31, 1999, for any reason; PROVIDED, HOWEVER, that the
    right to terminate this Agreement under this Section 7.1(b) shall not be
    available to any party whose action or failure to act has been a principal
    cause of or resulted in the failure of the Merger to occur on or before such
    date and such action or failure to act constitutes a breach by such party of
    this Agreement;
 
                                       34
<PAGE>
        (c) by either broadcast.com or Yahoo! if a Governmental Entity shall
    have issued an order, decree or ruling or taken any other action, in any
    case having the effect of permanently restraining, enjoining or otherwise
    prohibiting the Merger, which order, decree, ruling or other action is final
    and nonappealable;
 
        (d) by either broadcast.com or Yahoo! if the required approval of the
    stockholders of broadcast.com contemplated by this Agreement shall not have
    been obtained by reason of the failure to obtain the required vote at a
    meeting of broadcast.com stockholders duly convened therefor or at any
    adjournment thereof (provided that the right to terminate this Agreement
    under this Section 7.1(d) shall not be available to broadcast.com where the
    failure to obtain broadcast.com stockholder approval shall have been caused
    by the action or failure to act of broadcast.com and such action or failure
    to act constitutes a breach by broadcast.com of this Agreement);
 
        (e) by Yahoo! if a Triggering Event (as defined below) shall have
    occurred.
 
        (f) by broadcast.com, upon a breach of any representation, warranty,
    covenant or agreement on the part of Yahoo! set forth in this Agreement, or
    if any representation or warranty of Yahoo! shall have become untrue, in
    either case such that the conditions set forth in Section 6.2(a) or Section
    6.2(b) would not be satisfied as of the time of such breach or as of the
    time such representation or warranty shall have become untrue, PROVIDED that
    if such inaccuracy in Yahoo!'s representations and warranties or breach by
    Yahoo! is curable by Yahoo! through the exercise of its commercially
    reasonable efforts, then broadcast.com may not terminate this Agreement
    under this Section 7.1(f) for twenty (20) days after delivery of written
    notice from broadcast.com to Yahoo! of such breach, provided Yahoo!
    continues to exercise commercially reasonable efforts to cure such breach
    (it being understood that broadcast.com may not terminate this Agreement
    pursuant to this Section 7.1(f) if it shall have materially breached this
    Agreement or if such breach by Yahoo! is cured during such 20-day period and
    PROVIDED that such cure shall be completed on or prior to October 31, 1999);
    or
 
        (g) by Yahoo!, upon a breach of any representation, warranty, covenant
    or agreement on the part of broadcast.com set forth in this Agreement, or if
    any representation or warranty of broadcast.com shall have become untrue, in
    either case such that the conditions set forth in Section 6.3(a) or Section
    6.3(b) would not be satisfied as of the time of such breach or as of the
    time such representation or warranty shall have become untrue, PROVIDED that
    if such inaccuracy in broadcast.com's representations and warranties or
    breach by broadcast.com is curable by broadcast.com through the exercise of
    its commercially reasonable efforts, then Yahoo! may not terminate this
    Agreement under this Section 7.1(g) for twenty (20) days after delivery of
    written notice from Yahoo! to broadcast.com of such breach, provided
    broadcast.com continues to exercise commercially reasonable efforts to cure
    such breach (it being understood that Yahoo! may not terminate this
    Agreement pursuant to this Section 7.1(g) if it shall have materially
    breached this Agreement or if such breach by broadcast.com is cured during
    such 20-day period and PROVIDED that such cure shall be completed on or
    prior to October 31, 1999).
 
        For the purposes of this Agreement, a "TRIGGERING EVENT" shall be deemed
    to have occurred if: (i) the Board of Directors of broadcast.com or any
    committee thereof having authority to bind the Board shall for any reason
    have withdrawn or shall have amended or modified in a manner adverse to
    Yahoo! its recommendation in favor of the adoption and approval of the
    Agreement or the approval of the Merger; (ii) broadcast.com shall have
    failed to include in the Proxy Statement/Prospectus the recommendation of
    the Board of Directors of broadcast.com in favor of the adoption and
    approval of the Agreement and the approval of the Merger; (iii) the Board of
    Directors of broadcast.com fails to reaffirm its recommendation in favor of
    the adoption and approval of the Agreement and the approval of the Merger
    within 15 business days after Yahoo! requests in writing that such
    recommendation be reaffirmed at any time following the public announcement
    of an Acquisition Proposal; (iv) the Board of Directors of broadcast.com or
    any committee thereof having authority to bind the
 
                                       35
<PAGE>
    Board shall have approved or publicly recommended any Acquisition Proposal;
    (v) broadcast.com shall have entered into any letter of intent of similar
    document or any agreement, contract or commitment accepting any Acquisition
    Proposal; (vi) a tender or exchange offer relating to securities of
    broadcast.com in excess of 50% of its outstanding voting securities shall
    have been commenced by a person unaffiliated with Yahoo! and broadcast.com
    shall have sent to its stockholders pursuant to Rule 14e-2 promulgated under
    the Exchange Act a statement disclosing that broadcast.com recommends
    acceptance of such tender or exchange offer; or (vii) broadcast.com shall
    have intentionally breached its obligations under Section 5.4.
 
    7.2  NOTICE OF TERMINATION EFFECT OF TERMINATION.  Any termination of this
Agreement under Section 7.1 above will be effective immediately upon the
delivery of written notice of the terminating party to the other parties hereto.
In the event of the termination of this Agreement as provided in Section 7.1,
this Agreement shall be of no further force or effect and there shall be no
liability hereunder on the part of broadcast.com, Yahoo!, Merger Sub or their
respective officers or directors, except (i) as set forth in this Section 7.2,
Section 7.3 and Article VIII (Miscellaneous), each of which shall survive the
termination of this Agreement, and (ii) nothing herein shall relieve any party
from liability for any willful or intentional breach of this Agreement. No
termination of this Agreement shall affect the obligations of the parties
contained in the Confidentiality Agreement, all of which obligations shall
survive termination of this Agreement in accordance with their terms.
 
    7.3  FEES AND EXPENSES.
 
    (a)  GENERAL.  Except as set forth in this Section 7.3, all fees and
expenses incurred in connection with this Agreement and the transactions
contemplated hereby shall be paid by the party incurring such expenses whether
or not the Merger is consummated; provided, however, that Yahoo! and
broadcast.com shall share equally all fees and expenses, other than attorneys'
and accountants fees and expenses, incurred in relation to the printing and
filing with the SEC of the Proxy Statement/Prospectus (including any preliminary
materials related thereto) and the Registration Statement (including financial
statements and exhibits) and any amendments or supplements thereto.
 
    (b)  BROADCAST.COM PAYMENTS.  In the event that this Agreement is terminated
by Yahoo! pursuant to Section 7.1(e), broadcast.com shall promptly, but in no
event later than one day after the date of such termination, pay Yahoo! a fee
equal to $135,000,000 in immediately available funds (the "TERMINATION FEE"). In
addition, in the event that this Agreement is terminated by Yahoo! or
broadcast.com, as the case may be, pursuant to Section 7.1(d) and prior to the
vote of broadcast.com stockholders at the broadcast.com Stockholders' Meeting an
Acquisition Proposal shall have been publicly announced, broadcast.com shall
promptly, but in no event later than one day after the date of such termination,
pay Yahoo! a amount equal to Yahoo!'s documented expenses incurred in connection
with the transactions contemplated by this Agreement, and furthermore, in the
event that within 270 days following such termination broadcast.com shall enter
into a definitive agreement with respect to an Acquisition Transaction (defined
for this purpose to substitute "50%" for the references to "30%" and "70%" in
the definition set forth in Section 5.4(a)) or shall consummate an Acquisition
Transaction (defined for this purpose to substitute "50%" for the references to
"30%" and "70%" in the definition set forth in Section 5.4(a)) with a third
party, broadcast.com shall contemporaneously with such execution or
consummation, as the case may be, pay Yahoo! a fee equal to the Termination Fee.
broadcast.com acknowledges that the agreements contained in this Section 7.3(b)
are an integral part of the transactions contemplated by this Agreement, and
that, without these agreements, Yahoo! would not enter into this Agreement;
accordingly, if broadcast.com fails promptly to pay the amounts due pursuant to
this Section 7.3(b), and, in order to obtain such payment, Yahoo! commences a
suit which results in a judgment against broadcast.com for the amounts set forth
in this Section 7.3(b), broadcast.com shall pay to Yahoo! its reasonable costs
and expenses (including attorneys' fees and expenses) in connection with such
suit, together with interest on the amounts set forth in this Section 7.3(b) at
the prime rate of The Chase Manhattan Bank in effect on the date such payment
was required to be made.
 
                                       36
<PAGE>
    (c) Payment of the fees described in Section 7.3(b) above shall not be in
lieu of damages incurred in the event of a willful or intentional breach of this
Agreement.
 
    (d) Notwithstanding any provision of this Agreement to the contrary, the
"Total Proceeds" (as hereinafter defined) that Yahoo! shall be permitted to
realize in respect of the Termination Fee and the broadcast.com Stock Option
shall not exceed $165,000,000. In the event Yahoo!'s Total Proceeds would exceed
such amount, Yahoo! shall, at its sole election, (a) reduce the number of shares
of broadcast.com Common Stock subject to the broadcast.com Stock Option, (b)
deliver shares of broadcast.com Common Stock received upon an exercise of the
broadcast.com Stock Option to broadcast.com for cancellation, (c) pay an amount
of cash to broadcast.com, or (d) do any combination of the foregoing so that
Yahoo!'s actual realized Total Proceeds shall not exceed $165,000,000. "TOTAL
PROCEEDS" shall mean the aggregate (before taxes) of (i) any amount received
pursuant to broadcast.com's repurchase of that broadcast.com Stock Option (or
any portion thereof), (ii) any amount received pursuant to broadcast.com's
repurchase of the shares of broadcast.com Common Stock (less the purchase price
for such shares), (iii) any net cash received pursuant to the sale of shares of
broadcast.com Common Stock received by Yahoo! in any exercise of the
broadcast.com Stock Option to any third party (less the purchase price of such
shares), (iv) any amounts received on transfer of the broadcast.com Stock Option
or any portion thereof to a third party, (v) any equivalent amounts received
with respect to the broadcast.com Stock Option adjusted pursuant to Section
5.13(f), and (vi) the Termination Fee actually paid.
 
    7.4  AMENDMENT.  Subject to applicable law, this Agreement may be amended by
the parties hereto at any time by execution of an instrument in writing signed
on behalf of each of Yahoo!, Merger Sub and broadcast.com.
 
    7.5  EXTENSION; WAIVER.  At any time prior to the Effective Time any party
hereto may, to the extent legally allowed, (i) extend the time for the
performance of any of the obligations or other acts of the other parties hereto,
(ii) waive any inaccuracies in the representations and warranties made to such
party contained herein or in any document delivered pursuant hereto, and (iii)
waive compliance with any of the agreements or conditions for the benefit of
such party contained herein. Any agreement on the part of a party hereto to any
such extension or waiver shall be valid only if set forth in an instrument in
writing signed on behalf of such party. Delay in exercising any right under this
Agreement shall not constitute a waiver of such right.
 
                                  ARTICLE VIII
                               GENERAL PROVISIONS
 
    8.1  NON-SURVIVAL OF REPRESENTATIONS AND WARRANTIES.  The representations
and warranties of broadcast.com, Yahoo! and Merger Sub contained in this
Agreement shall terminate at the Effective Time, and only the covenants that by
their terms survive the Effective Time shall survive the Effective Time.
 
    8.2  NOTICES.  All notices and other communications hereunder shall be in
writing and shall be deemed given if delivered personally or by commercial
delivery service, or sent via telecopy (receipt confirmed) to the parties at the
following addresses or telecopy numbers (or at such other address or telecopy
numbers for a party as shall be specified by like notice):
 
        (a) if to Yahoo! or Merger Sub, to:
 
            Yahoo! Inc.
           3420 Central Expressway
           Santa Clara, CA 95051
           Attention: Chief Executive Officer
           Telephone No.: (408) 731-3300
           Telecopy No.: (408) 731-3510
 
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<PAGE>
            with a copy at the same address to the attention of the General
            Counsel and Secretary and with a copy to:
 
            Venture Law Group
           A Professional Corporation
           2800 Sand Hill Road
           Menlo Park, California 94025
           Attention: Steven J. Tonsfeldt
           Telephone No.: (650) 854-4488
           Telecopy No.: (650) 233-8386
 
        (b) if to broadcast.com, to:
 
            broadcast.com inc.
           2914 Taylor Street
           Dallas, TX 75226
           Attention: Chief Executive Officer
           Telephone No.: (214) 748-6660
           Telecopy No.: (214) 748-2470
 
            with a copy to:
 
            Gibson, Dunn & Crutcher LLP
           200 Park Avenue
           New York, New York 10166
           Attention: Sean P. Griffiths
           Telephone No.: (212) 351-4000
           Telecopy No.: (212) 351-4035
 
    8.3  INTERPRETATION; CERTAIN DEFINED TERMS.
 
    (a) When a reference is made in this Agreement to Exhibits, such reference
shall be to an Exhibit to this Agreement unless otherwise indicated. When a
reference is made in this Agreement to Sections, such reference shall be to a
Section of this Agreement unless otherwise indicated. The words "INCLUDE,"
"INCLUDES" and "INCLUDING" when used herein shall be deemed in each case to be
followed by the words "WITHOUT LIMITATIONS." The table of contents and headings
contained in this Agreement are for reference purposes only and shall not affect
in any way the meaning or interpretation of this Agreement. When reference is
made herein to "THE BUSINESS OF" an entity, such reference shall be deemed to
include the business of all direct and indirect subsidiaries of such entity.
Reference to the subsidiaries of an entity shall be deemed to include all direct
and indirect subsidiaries of such entity.
 
    (b) For purposes of this Agreement the term "KNOWLEDGE" means with respect
to a party hereto, with respect to any matter in question, that any of the
executive officers of such party has actual knowledge of such matter.
 
    (c) For purposes of this Agreement, the term "MATERIAL ADVERSE EFFECT" when
used in connection with a party hereto means any change, event, circumstance or
effect that is materially adverse to the business, assets (including intangible
assets), capitalization, financial condition or results of operations of such
party and its subsidiaries taken as a whole, except (i) any continued or
increased operating losses (provided that obligations of broadcast.com set forth
in Section 4.1 are complied with) or (ii) to the extent that any such change,
event or effect is attributable to or results from (w) the direct effect of the
public announcement or pendency of the transactions contemplated hereby on
current or prospective customers or revenues of broadcast.com, (x) changes in
general economic conditions or changes affecting the industry generally in which
such party operates, (y) changes in trading prices for such party's capital
stock, or (z) stockholder class action litigation arising from allegations of a
breach of fiduciary duty of the
 
                                       38
<PAGE>
broadcast.com Board of Directors relating to this Agreement; PROVIDED, HOWEVER,
that with respect to clause (ii)(w) of this sentence, broadcast.com shall bear
the burden of proof in any proceeding with regard to establishing that any
change, event, circumstance or effect is attributable to or results from the
direct effect of the public announcement or pendency of the transactions
contemplated hereby.
 
    (d) For purposes of this Agreement, the term "PERSON" shall mean any
individual, corporation (including any non-profit corporation), general
partnership, limited partnership, limited liability partnership, joint venture,
estate, trust, broadcast.com (including any limited liability broadcast.com or
joint stock broadcast.com), firm or other enterprise, association, organization,
entity or Governmental Entity.
 
    (e) For purposes of this Agreement, "SUBSIDIARY" of a specified entity will
be any corporation, partnership, limited liability broadcast.com, joint venture
or other legal entity of which the specified entity (either alone or through or
together with any other subsidiary) owns, directly or indirectly, fifty percent
(50%) or more of the stock or other equity or partnership interests the holders
of which are generally entitled to vote for the election of the Board of
Directors or other governing body of such corporation or other legal entity.
 
    8.4  COUNTERPARTS.  This Agreement may be executed in one or more
counterparts, and by facsimile, all of which shall be considered one and the
same agreement and shall become effective when one or more counterparts have
been signed by each of the parties and delivered to the other party, it being
understood that all parties need not sign the same counterpart.
 
    8.5  ENTIRE AGREEMENT; THIRD PARTY BENEFICIARIES.  This Agreement and the
documents and instruments and other agreements among the parties hereto as
contemplated by or referred to herein, including the broadcast.com Disclosure
Letter and the Yahoo! Disclosure Letter (a) constitute the entire agreement
among the parties with respect to the subject matter hereof and supersede all
prior agreements and understandings, both written and oral, among the parties
with respect to the subject matter hereof, it being understood that the
Confidentiality Agreement shall continue in full force and effect until the
Closing and shall survive any termination of this Agreement; and (b) are not
intended to confer upon any other person any rights or remedies hereunder,
except as specifically provided in Section 5.10.
 
    8.6  SEVERABILITY.  In the event that any provision of this Agreement or the
application thereof, becomes or is declared by a court of competent jurisdiction
to be illegal, void or unenforceable, the remainder of this Agreement will
continue in full force and effect and the application of such provision to other
persons or circumstances will be interpreted so as reasonably to effect the
intent of the parties hereto. The parties further agree to replace such void or
unenforceable provision of this Agreement with a valid and enforceable provision
that will achieve, to the extent possible, the economic, business and other
purposes of such void or unenforceable provision.
 
    8.7  OTHER REMEDIES; SPECIFIC PERFORMANCE.  Except as otherwise provided
herein, any and all remedies herein expressly conferred upon a party will be
deemed cumulative with and not exclusive of any other remedy conferred hereby,
or by law or equity upon such party, and the exercise by a party of any one
remedy will not preclude the exercise of any other remedy. The parties hereto
agree that irreparable damage would occur in the event that any of the
provisions of this Agreement were not performed in accordance with their
specific terms or were otherwise breached. It is accordingly agreed that the
parties shall be entitled to seek an injunction or injunctions to prevent
breaches of this Agreement and to enforce specifically the terms and provisions
hereof in any court of the United States or any state having jurisdiction, this
being in addition to any other remedy to which they are entitled at law or in
equity.
 
    8.8  GOVERNING LAW.  This Agreement shall be governed by and construed in
accordance with the laws of the State of Delaware, regardless of the laws that
might otherwise govern under applicable principles of conflicts of law thereof.
 
    8.9  RULES OF CONSTRUCTION.  The parties hereto agree that they have been
represented by counsel during the negotiation and execution of this Agreement
and, therefore, waive the application of any law,
 
                                       39
<PAGE>
regulation, holding or rule of construction providing that ambiguities in an
agreement or other document will be construed against the party drafting such
agreement or document.
 
    8.10  ASSIGNMENT.  No party may assign either this Agreement or any of its
rights, interests, or obligations hereunder without the prior written approval
of the other parties. Subject to the preceding sentence, this Agreement shall be
binding upon and shall inure to the benefit of the parties hereto and their
respective successors and permitted assigns.
 
    8.11  WAIVER OF JURY TRIAL.  EACH OF YAHOO!, BROADCAST.COM AND MERGER SUB
HEREBY IRREVOCABLY WAIVES ALL RIGHT TO TRIAL BY JURY IN ANY ACTION, PROCEEDING
OR COUNTERCLAIM (WHETHER BASED ON CONTRACT, TORT OR OTHERWISE) ARISING OUT OF OR
RELATING TO THIS AGREEMENT OR THE ACTIONS OF YAHOO!, BROADCAST.COM OR MERGER SUB
IN THE NEGOTIATION, ADMINISTRATION, PERFORMANCE AND ENFORCEMENT HEREOF.
 
                                     *****
 
                                       40
<PAGE>
    IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be
executed by their duly authorized respective officers as of the date first
written above.
 
                                          YAHOO! INC.
                                          By: /s/ TIMOTHY K. KOOGLE
                                             -----------------------------------
                                          Name: Timothy K. Koogle
                                               ---------------------------------
                                          Title: Chairman and Chief Executive
                                          Officer
                                               ---------------------------------
 
                                          ALAMO ACQUISITION CORP.
                                          By: /s/ TIMOTHY K. KOOGLE
                                             -----------------------------------
                                          Name: Timothy K. Koogle
                                               ---------------------------------
                                          Title: President
                                               ---------------------------------
 
                                          BROADCAST.COM INC.
                                          By: /s/ TODD WAGNER
                                             -----------------------------------
                                          Name: Todd Wagner
                                               ---------------------------------
                                          Title: Chief Executive Officer
                                               ---------------------------------
 
                     **** AGREEMENT AND PLAN OF MERGER ****
 
                                       41

<PAGE>
                                VOTING AGREEMENT
 
    THIS VOTING AGREEMENT is made and entered into as of March 31, 1999 (this
"VOTING AGREEMENT"), by and between Yahoo! Inc., a California corporation
("PARENT"), and the stockholders of broadcast.com inc., a Delaware corporation
("COMPANY"), identified on the signature page hereto (each a "STOCKHOLDER" and,
collectively, the "STOCKHOLDERS").
 
                                    RECITALS
 
    A. Parent, Alamo Acquisition Corp., a Delaware corporation and a newly
formed wholly owned direct subsidiary of Parent ("MERGER SUB"), and Company have
contemporaneously with the execution of this Voting Agreement entered into an
Agreement and Plan of Merger dated as of March 31, 1999 (the "MERGER AGREEMENT")
which provides, among other things, that Merger Sub shall be merged (the
"MERGER") with and into Company pursuant to the terms and conditions thereof;
 
    B.  As an essential condition and inducement to Parent to enter into the
Merger Agreement and in consideration therefor, the Stockholders and Parent have
agreed to enter into this Voting Agreement; and
 
    C.  As of the date hereof, each Stockholder owns of record and beneficially
the shares of common stock, par value $0.01 per share, of Company ("COMPANY
COMMON STOCK") set forth on the signature page hereto and desires to enter into
this Voting Agreement with respect to such shares of Company Common Stock;
 
    NOW, THEREFORE, in consideration of the foregoing and the mutual covenants
and agreements contained herein and in the Merger Agreement, the parties hereto
agree as follows:
 
                                   ARTICLE I
 
    1.  VOTING OF SHARES.
 
    1.1  VOTING AGREEMENT.  Each Stockholder hereby agrees to (a) appear, or
cause the holder of record on any applicable record date (the "RECORD HOLDER")
to appear for the purpose of obtaining a quorum at any annual or special meeting
of stockholders of Company and at any adjournment thereof at which matters
relating to the Merger, the Merger Agreement or any transaction contemplated
thereby are considered and (b) vote, or cause the Record Holder to vote, in
person or by proxy, all of the shares of Company Common Stock owned by such
Stockholder, or with respect to which such Stockholder has or shares voting
power or control, and all of the shares of Company Common Stock which shall, or
with respect to which voting power or control shall, hereafter be acquired by
such Stockholder (collectively, the "SHARES") in favor of the Merger, the Merger
Agreement and the transactions contemplated by the Merger Agreement. In the
event written consents are solicited or otherwise sought from stockholders of
Company with respect to approval or adoption of the Merger Agreement, with
respect to the approval of the Merger or with respect to any of the other
actions contemplated by the Merger Agreement, each Stockholder shall (unless
otherwise directed by Parent) execute, or cause the Record Holder to execute,
with respect to all Shares a written consent or written consents to such
proposed action.
 
    1.2  GRANT OF PROXY.  In furtherance of the foregoing, each Stockholder, by
this Agreement, with respect to all Shares now owned of record or that may
hereafter be acquired by such Stockholder at anytime prior to the Effective
Time, does hereby constitute and appoint Parent and Merger Sub, or any nominee
of Parent and Merger Sub, with full power of substitution, from the date hereof
to the earlier to occur of the termination of this Voting Agreement or the
Effective Time, as its true and lawful attorney and proxy (its "PROXY"), for and
in its name, place and stead, to demand that the Secretary of Company call a
special meeting of stockholders of Company for the purpose of considering any
action related to the Merger Agreement and to vote each of such Shares as its
Proxy at every annual, special or adjourned meeting of stockholders of Company,
including the right to sign its name (as stockholder) to any consent,
certificate or other document relating to Company that the law of the State of
Delaware may permit or require, in favor of the Merger, the Merger Agreement and
the transactions contemplated by the Merger Agreement. This Proxy and power of
attorney is irrevocable to the fullest extent permitted by the law of the State
of Delaware and is coupled with an interest.
<PAGE>
    1.3  FURTHER ASSURANCES.  Each Stockholder shall perform such further acts
and execute such further documents and instruments as may reasonably be required
to vest in Parent and Merger Sub the power to carry out and give effect to the
provisions of this Voting Agreement.
 
    1.4  NO OWNERSHIP INTEREST.  Nothing contained in this Voting Agreement
shall be deemed to vest in Parent any direct or indirect ownership or incidence
of ownership of or with respect to any Shares. All rights, ownership and
economic benefits of and relating to the Shares shall remain and belong to the
Stockholders, and Parent shall have no authority to manage, direct, superintend,
restrict, regulate, govern, or administer any of the policies or operations of
Company or exercise any power or authority to direct the Stockholders in the
voting of any of the Shares, except as otherwise provided herein, or the
performance of any Stockholder's duties or responsibilities as a stockholder of
Company.
 
    1.5  DOCUMENTS DELIVERED.  Each Stockholder acknowledges receipt of copies
of the following documents:
 
        (a) the Merger Agreement and all Exhibits and Schedules thereto; and
 
        (b) each report filed with the Securities and Exchange Commission (the
    "SEC") by the Parent on Forms 10-K, 8-K and 10-Q since August 1, 1998 and
    the preliminary proxy statement filed by GeoCities with the SEC on February
    26, 1999.
 
    1.6  NO INCONSISTENT AGREEMENTS.  Each Stockholder hereby covenants and
agrees that, except as contemplated by this Voting Agreement and the Merger
Agreement, such Stockholder (a) has not entered, and shall not enter at any time
while this Voting Agreement remains in effect, into any voting agreement
relating to the subject matter hereof and (b) has not granted, and shall not
grant at any time while this Voting Agreement remains in effect, a proxy or
power of attorney, in either case which is inconsistent with this Voting
Agreement.
 
                                   ARTICLE II
 
    2.  RESTRICTIONS ON TRANSFER.
 
    (a) Each Stockholder hereby covenants and agrees that such Stockholder will
not, prior to the termination of this Voting Agreement, either directly or
indirectly, sell, assign, pledge, hypothecate, transfer, exchange, or dispose
("TRANSFER") of any Shares or options to purchase Company Common Stock
("OPTIONS") or any other securities or rights convertible into or exchangeable
for shares of Company Common Stock, owned either directly or indirectly by such
Stockholder or with respect to which such Stockholder has the power of
disposition, whether now or hereafter acquired, without the prior written
consent of Parent; PROVIDED that nothing contained herein will be deemed to
restrict the exercise of Options; and PROVIDED FURTHER that the foregoing
requirements shall not prohibit any Transfer to any person or entity where as a
pre-condition to such Transfer the transferee agrees to be bound by all of the
terms and conditions of this Voting Agreement and delivers a duly executed copy
of this Voting Agreement to Parent to evidence such agreement.
 
    (b) Each Stockholder hereby agrees and consents to the entry of stop
transfer instructions by Company against the transfer of any Shares consistent
with the terms of Section 2.1(a) hereof.
 
                                  ARTICLE III
 
    3.  REPRESENTATIONS AND WARRANTIES OF STOCKHOLDER.  Each Stockholder hereby
represents and warrants to Parent as follows:
 
        3.1  AUTHORITY RELATIVE TO THIS AGREEMENT.  Stockholder is competent to
    execute and deliver this Voting Agreement, to perform its obligations
    hereunder and to consummate the transactions contemplated hereby. This
    Voting Agreement has been duly and validly executed and delivered by
    Stockholder and, assuming the due authorization, execution and delivery by
    Parent, constitutes a legal,
 
                                       2
<PAGE>
    valid and binding obligation of Stockholder, enforceable against Stockholder
    in accordance with its terms.
 
        3.2  NO CONFLICT.  The execution and delivery of this Voting Agreement
    by Stockholder does not, and the performance of this Voting Agreement by
    Stockholder shall not, result in any breach of or constitute a default (or
    an event that with notice or lapse of time or both would become a default)
    under, or give to others any rights of termination, amendment, acceleration
    or cancellation of, or result in the creation of a lien or encumbrance, on
    any of the Shares or Options pursuant to, any note, bond, mortgage,
    indenture, contract, agreement, lease, license, permit, franchise or other
    instrument or obligation to which Stockholder is a party or by which
    Stockholder or the Shares or Options are bound or affected.
 
        3.3  TITLE TO THE SHARES.  The Shares and Options held by Stockholder
    are owned free and clear of all security interests, liens, claims, pledges,
    options, rights of first refusal, agreements, limitations on Stockholder's
    voting rights, charges and other encumbrances of any nature that would
    adversely affect the exercise or fulfillment of the rights and obligations
    of the parties to this Voting Agreement, and Stockholder has not appointed
    or granted any proxy, which appointment or grant remains effective, with
    respect to the Shares (other than under this Voting Agreement).
 
        3.4  SCOPE OF REPRESENTATIONS.  Parent acknowledges that the
    representations made in this Article III are made by each Stockholder only
    as to himself or itself, as the case may be.
 
                                   ARTICLE IV
 
    4.  MISCELLANEOUS.
 
    4.1  NO SOLICITATION.  From the date hereof until the Effective Time or, if
earlier, the termination of the Merger Agreement, no Stockholder shall (whether
directly or indirectly through advisors, agents or other intermediaries) (a)
solicit, initiate or encourage any Acquisition Proposal or (b) engage in
discussions or negotiations with, or disclose any non-public information
relating to Company or its subsidiaries to any person that has made an
Acquisition Proposal or has advised Stockholder, or to its knowledge, Company or
any other stockholder of Company, that such person is interested in making an
Acquisition Proposal.
 
    4.2  TERMINATION.  This Agreement shall terminate upon the earliest to occur
of (a) the termination of the Merger Agreement in accordance with its terms or
(b) the Effective Time. Upon such termination, no party shall have any further
obligations or liabilities hereunder, PROVIDED that no such termination shall
relieve any party from liability for any breach of this Voting Agreement prior
to such termination.
 
    4.3  ENFORCEMENT OF AGREEMENT.  The parties hereto agree that irreparable
damage would occur in the event that any of the provisions of this Voting
Agreement were not performed in accordance with its specified terms or were
otherwise breached. It is accordingly agreed that the parties shall be entitled
to an injunction or injunctions to prevent breaches of this Voting Agreement and
to specific performance of the terms and provisions hereof in addition to any
other remedy to which they are entitled at law or in equity.
 
    4.4  SUCCESSORS AND AFFILIATES.  This Voting Agreement shall inure to the
benefit of and shall be binding upon the parties hereto and their respective
heirs, legal representatives and permitted assigns. If any Stockholder shall at
any time hereafter acquire ownership of, or voting power with respect to, any
additional Shares in any manner, whether by the exercise of any Options or any
securities or rights convertible into or exchangeable for shares of Company
Common Stock, by operation of law or otherwise, such Shares shall be held
subject to all of the terms and provisions of this Voting Agreement. Without
limiting the foregoing, each Stockholder specifically agrees that the
obligations of such Stockholder hereunder shall not be terminated by operation
of law, whether by death or incapacity of such Stockholder or otherwise.
 
                                       3
<PAGE>
    4.5  ENTIRE AGREEMENT.  This Voting Agreement, together with the Company
Affiliates Agreements, in the form attached as EXHIBIT B to the Merger
Agreement, constitutes the entire agreement among Parent and the Stockholders
with respect to the subject matter hereof and supersedes all prior agreements
and understandings, both written and oral, among Parent and the Stockholders
with respect to the subject matter hereof.
 
    4.6  CAPTIONS AND COUNTERPARTS.  The captions in this Voting Agreement are
for convenience only and shall not be considered a part of or affect the
construction or interpretation of any provision of this Voting Agreement. This
Voting Agreement may be executed in several counterparts, each of which shall
constitute one and the same instrument.
 
    4.7  AMENDMENT.  This Voting Agreement may not be amended except by an
instrument in writing signed by the parties hereto.
 
    4.8  WAIVERS.  Except as provided in this Voting Agreement, no action taken
pursuant to this Voting Agreement, including without limitation any
investigation by or on behalf of any party, shall be deemed to constitute a
waiver by the party taking such action of compliance with any representations,
warranties, covenants or agreements contained in this Voting Agreement. The
waiver by any party hereto of a breach of any provision hereunder shall not
operate or be construed as a wavier of any prior or subsequent breach of the
same or any other provision hereunder.
 
    4.9  SEVERABILITY.  If any term or other provision of this Voting Agreement
is invalid, illegal or incapable of being enforced by any rule of law, or public
policy, all other conditions and provisions of this Voting Agreement shall
nevertheless remain in full force and effect. Upon such determination that any
term or other provision is invalid, illegal or incapable of being enforced, the
parties hereto shall negotiate in good faith to modify this Voting Agreement so
as to effect the original intent of the parties as closely as possible to the
fullest extent permitted by applicable law in a mutually acceptable manner in
order that the terms of this Voting Agreement remain as originally contemplated
to the fullest extent possible.
 
    4.10  NOTICES.  All notices and other communications given or made pursuant
hereto shall be in writing and shall be deemed to have been duly given or made
and shall be effective upon receipt, if delivered personally, upon receipt of a
transmission confirmation if sent by facsimile (with a confirming copy sent by
overnight courier) and on the next business day if sent by Federal Express,
United Parcel Service, Express Mail or other reputable overnight courier to the
parties at the following addresses (or at such other address for a party as
shall be specified by notice):
 
<TABLE>
<S>                          <C>
If to a Stockholder:         At the address set forth opposite such
                             Stockholder's name on the signature page hereto
 
With a copy to:              Gibson, Dunn & Crutcher LLP
                             200 Park Avenue
                             New York, New York 10166
                             Attention: Sean P. Griffiths
                             Telephone No.: (212) 351-4000
                             Telecopy No.: (212) 351-4035
</TABLE>
 
                                       4
<PAGE>
<TABLE>
<S>                          <C>
If to Parent or Merger Sub:  Yahoo! Inc.
                             3420 Central Expressway
                             Santa Clara, CA 95051
                             Attention: Chief Executive Officer
                             Telephone No.: (408) 731-3300
                             Telecopy No.: (408) 731-3510
 
with a copy at the same address to the attention of the General Counsel and
Secretary and with a copy to:
 
                             Venture Law Group
                             A Professional Corporation
                             2800 Sand Hill Road
                             Menlo Park, California 94025
                             Attention: Steven J. Tonsfeldt
                             Telephone No.: (650) 854-4488
                             Telecopy No.: (650) 233-8386
</TABLE>
 
    4.11  GOVERNING LAW.  This Voting Agreement shall be governed by, and
construed in accordance with, the laws of the State of Delaware regardless of
the laws that might otherwise govern under applicable principles of conflicts of
law.
 
    4.12  DEFINITIONS.  Capitalized terms used and not defined herein shall have
the meaning set forth in the Merger Agreement.
 
    4.13  OFFICERS AND DIRECTORS.  No person who is or becomes (during the term
hereof) a director or officer of Company makes any agreement or understanding
herein in his or her capacity as such director or officer, and nothing herein
will limit or affect, or give rise to any liability to any Stockholder by virtue
of, any actions taken by such Stockholder in his or her capacity as an officer
or director of Company in exercising its rights under the Merger Agreement.
 
    4.14  INTERPRETATION.  The parties have participated jointly in the
negotiation of this Voting Agreement. In the event that an ambiguity or question
of intent or interpretation arises, this Voting Agreement shall be construed as
if drafted jointly by the parties, and no presumption or burden of proof shall
arise favoring or disfavoring any party by virtue of the authorship of the
provisions of this Voting Agreement.
 
                           [SIGNATURE PAGE TO FOLLOW]
 
                                       5
<PAGE>
    IN WITNESS WHEREOF, each of the parties hereto have caused this Voting
Agreement to be duly executed as of the date first written above.
 
                                          YAHOO! INC.
                                          By: /s/ TIMOTHY K. KOOGLE
                                             -----------------------------------
                                          Name: Timothy K. Koogle
                                               ---------------------------------
                                          Title: CEO
                                               ---------------------------------
 
                                          STOCKHOLDER
                                          Motorola, Inc.
                                          By: /s/ CARL F. KOENEMANN
                                             -----------------------------------
                                          Name: Carl F. Koenemann
                                               ---------------------------------
                                          Title: Executive Vice President and
                                               Chief Financial Officer,
                                          Corporate Finance
                                               ---------------------------------
 
                                          Address: 1303 Algonquin Road
                                                 -------------------------------
                                                 Schaumberg, IL 60196
                                                 -------------------------------
                                                 Attn: Chief Financial Officer
                                                 -------------------------------
 
Number of Shares of Company
Common Stock owned: 2,328,512
                    ------------------
 
Number of Shares of Company
Common Stock as to which options
issued to Stockholder are
exercisable: 27,300 (7,500 of which
are vested)*
        ------------------------------
 
 *  The options were granted to Mr. Steven D. Leeke, a Director of the Company
    and an officer of Motorola. Pursuant to an agreement between Mr, Leeke and
    Motorola, dated March 27, 1998, Mr. Leeke can exercise his options at the
    sole discretion and for the benfit of Motorola.
 
                                       6
<PAGE>
                                          STOCKHOLDER
 
                                          /s/ MARK CUBAN
                                          --------------------------------------
                                          Name: Mark Cuban
                                               ---------------------------------
                                          Address: 2914 Taylor
                                                 -------------------------------
                                                 Dallas, TX 75226
                                                 -------------------------------
 
Number of Shares of Company
Common Stock owned: 4,921,200
                    ------------------
 
Number of Shares of Company
Common Stock as to which options
issued to Stockholder are
exercisable: 282,960
        ------------------------------
 
                                          STOCKHOLDER
 
                                          /s/ TODD R. WAGNER
                                          --------------------------------------
                                          Name: Todd R. Wagner
                                               ---------------------------------
                                          Address: 2914 Taylor
                                                 -------------------------------
                                                 Dallas, TX 75226
                                                 -------------------------------
 
Number of Shares of Company
Common Stock owned: 9,249,480
                    ----------------------------------------
 
Number of Shares of Company
Common Stock as to which options
issued to Stockholder are
exercisable: 345,600
        ----------------------------------------
 
                           **** VOTING AGREEMENT ****
 
                                       7


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