<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> JUN-30-2000
<CASH> 41,409
<SECURITIES> 19,057
<RECEIVABLES> 5,274
<ALLOWANCES> 1,161
<INVENTORY> 0
<CURRENT-ASSETS> 65,013
<PP&E> 12,112
<DEPRECIATION> 4,745
<TOTAL-ASSETS> 72,642
<CURRENT-LIABILITIES> 10,230
<BONDS> 0
0
0
<COMMON> 19
<OTHER-SE> 61,527
<TOTAL-LIABILITY-AND-EQUITY> 72,642
<SALES> 0
<TOTAL-REVENUES> 12,240
<CGS> 0
<TOTAL-COSTS> 10,549
<OTHER-EXPENSES> 8,654<F1>
<LOSS-PROVISION> 436
<INTEREST-EXPENSE> 89
<INCOME-PRETAX> (14,947)
<INCOME-TAX> 76
<INCOME-CONTINUING> (15,023)
<DISCONTINUED> 0
<EXTRAORDINARY> 0
<CHANGES> 0
<NET-INCOME> (15,023)
<EPS-BASIC> (0.78)
<EPS-DILUTED> (0.78)
<FN>
<F1>INCLUDES NETWORK & OPERATIONS AND RESEARCH & DEVELOPMENT AND AMORTIZATION OF
STOCK-BASED COMPENSATION
</FN>
</TABLE>