<TABLE> <S> <C>
<PAGE>
<ARTICLE> 5
<MULTIPLIER> 1,000
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> DEC-31-2000
<PERIOD-START> JAN-01-2000
<PERIOD-END> SEP-30-2000
<CASH> 26,617
<SECURITIES> 24,739
<RECEIVABLES> 7,703
<ALLOWANCES> 1,733
<INVENTORY> 0
<CURRENT-ASSETS> 57,684
<PP&E> 15,441
<DEPRECIATION> 5,674
<TOTAL-ASSETS> 67,737
<CURRENT-LIABILITIES> 12,455
<BONDS> 0
0
0
<COMMON> 20
<OTHER-SE> 54,604
<TOTAL-LIABILITY-AND-EQUITY> 67,737
<SALES> 0
<TOTAL-REVENUES> 21,247
<CGS> 0
<TOTAL-COSTS> 17,873
<OTHER-EXPENSES> 13,689<F1>
<LOSS-PROVISION> 743
<INTEREST-EXPENSE> 134
<INCOME-PRETAX> (23,102)
<INCOME-TAX> 115
<INCOME-CONTINUING> (23,217)
<DISCONTINUED> 0
<EXTRAORDINARY> 0
<CHANGES> 0
<NET-INCOME> (23,217)
<EPS-BASIC> (1.20)
<EPS-DILUTED> (1.20)
<FN>
<F1>INCLUDES NETWORK & OPERATIONS AND RESEARCH & DEVELOPMENT AND AMORTIZATION OF
STOCK-BASED COMPENSATION.
</FN>
</TABLE>