<TABLE> <S> <C>
<PAGE>
<ARTICLE> 5
<MULTIPLIER> 1,000
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> APR-30-2001
<PERIOD-START> MAY-01-2000
<PERIOD-END> OCT-31-2000
<CASH> 135,267
<SECURITIES> 165,798
<RECEIVABLES> 15,625
<ALLOWANCES> 703
<INVENTORY> 0
<CURRENT-ASSETS> 322,579
<PP&E> 17,355
<DEPRECIATION> 6,216
<TOTAL-ASSETS> 424,909
<CURRENT-LIABILITIES> 25,978
<BONDS> 0
0
0
<COMMON> 47
<OTHER-SE> 409,489
<TOTAL-LIABILITY-AND-EQUITY> 424,909
<SALES> 26,696
<TOTAL-REVENUES> 36,014
<CGS> 1,522
<TOTAL-COSTS> 5,150
<OTHER-EXPENSES> 68,181
<LOSS-PROVISION> 0
<INTEREST-EXPENSE> 206
<INCOME-PRETAX> (29,011)
<INCOME-TAX> 0
<INCOME-CONTINUING> (29,011)
<DISCONTINUED> 0
<EXTRAORDINARY> 0
<CHANGES> 0
<NET-INCOME> (29,011)
<EPS-BASIC> (0.64)
<EPS-DILUTED> (0.64)
</TABLE>