<TABLE> <S> <C>
<PAGE>
<ARTICLE> 5
<LEGEND>
This schedule contains summary financial information extracted from the
consolidated balance sheet, consolidated statement of operations, and
consolidated statement of cash flows included in the Company's Form 10-Q for the
period ending September 30, 2000, and is qualified in its entirety by reference
to such financial statements.
</LEGEND>
<MULTIPLIER> 1,000
<S> <C>
<PERIOD-TYPE> 9-MOS
<FISCAL-YEAR-END> DEC-31-2000
<PERIOD-START> JAN-01-2000
<PERIOD-END> SEP-30-2000
<CASH> 125,009
<SECURITIES> 136,314
<RECEIVABLES> 0
<ALLOWANCES> 0
<INVENTORY> 0
<CURRENT-ASSETS> 265,676
<PP&E> 34,017
<DEPRECIATION> 15,987
<TOTAL-ASSETS> 338,275
<CURRENT-LIABILITIES> 37,441
<BONDS> 0
0
0
<COMMON> 48
<OTHER-SE> 269,846
<TOTAL-LIABILITY-AND-EQUITY> 338,275
<SALES> 0
<TOTAL-REVENUES> 18,644
<CGS> 0
<TOTAL-COSTS> 0
<OTHER-EXPENSES> 52,642
<LOSS-PROVISION> 0
<INTEREST-EXPENSE> (1,098)
<INCOME-PRETAX> (29,097)
<INCOME-TAX> 0
<INCOME-CONTINUING> (29,097)
<DISCONTINUED> 0
<EXTRAORDINARY> 0
<CHANGES> (4,800)
<NET-INCOME> (33,897)
<EPS-BASIC> (0.73)
<EPS-DILUTED> (0.73)
</TABLE>