<PAGE> 1
Exhibit 99.1
EXHIBIT 1
Pursuant to Rule 13d-1(k)(1)(iii) of Regulation 13D-G of the General
Rules and Regulations under the Securities Exchange Act of 1934, as amended, the
undersigned agree that the statement to which this Exhibit is attached is filed
on behalf of each of them in the capacities set forth below.
Dated: November 21, 2000 MERCANTILE VS, LLC, a Delaware limited
liability company
By: Mercantile Equity Partners III, L.P.,
an Illinois limited partnership, its
Managing Member
By: Mercantile Equity Partners III,
L.L.C., an Illinois limited
liability company, its General
Partner
By: /s/ I. Steven Edelson
-------------------------
Name: I. Steven Edelson
Title: Managing Member
MERCANTILE EQUITY PARTNERS III, L.P., an
Illinois limited partnership, its Managing
Member
By: Mercantile Equity Partners III, L.L.C.,
an Illinois limited liability company,
its General Partner
By: /s/ I. Steven Edelson
-------------------------
Name: I. Steven Edelson
Title: Managing Member
MERCANTILE EQUITY PARTNERS III, L.L.C., an
Illinois limited liability company, its
General Partner
By: /s/ I. Steven Edelson
-------------------------
Name: I. Steven Edelson
Title: Managing Member
MERCANTILE CAPITAL PARTNERS I, LP, an Illinois
limited partnership
By: Mercantile Capital Group, LLC, a
Delaware limited liability company, its
general partner
By: Mercantile Capital Management
Corp., an Illinois corporation,
its manager
By: /s/ I. Steven Edelson
------------------------
Name: I. Steven Edelson
Title: President
<PAGE> 2
MERCANTILE CAPITAL GROUP, LLC, a Delaware
limited liability company
By: Mercantile Capital Management Corp.,
an Illinois corporation, its manager
By: /s/ I. Steven Edelson
-------------------------
Name: I. Steven Edelson
Title: President
MERCANTILE CAPITAL MANAGEMENT CORP., an
Illinois corporation, its manager
By: /s/ I. Steven Edelson
----------------------------
Name: I. Steven Edelson
Title: President
/s/ Michael A. Reinsdorf
-----------------------------------
MICHAEL A. REINSDORF, an Individual
/s/ I. Steven Edelson
-----------------------------------
I. STEVEN EDELSON, an Individual
THE EDELSON FAMILY TRUST DATED
SEPTEMBER 17, 1997
By: /s/ I. Steven Edelson
----------------------------
Name: I. Steven Edelson
Title: Trustee
/s/ Nathaniel C.A. Kramer
-----------------------------------
NATHANIEL C.A. KRAMER, an Individual