<TABLE> <S> <C>
<PAGE>
<ARTICLE> 5
<LEGEND>
This schedule contains summary financial information extracted from this Form
10-Q and is qualified in its entirety by reference to such financial statements.
</LEGEND>
<MULTIPLIER> 1,000
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> APR-30-2001
<PERIOD-END> OCT-31-2000
<CASH> 44,674
<SECURITIES> 2,595
<RECEIVABLES> 6,978
<ALLOWANCES> 211
<INVENTORY> 239
<CURRENT-ASSETS> 56,131
<PP&E> 12,514
<DEPRECIATION> 4,398
<TOTAL-ASSETS> 94,572
<CURRENT-LIABILITIES> 7,537
<BONDS> 0
0
0
<COMMON> 143,035
<OTHER-SE> (57,022)
<TOTAL-LIABILITY-AND-EQUITY> 94,572
<SALES> 11,354
<TOTAL-REVENUES> 11,354
<CGS> 0
<TOTAL-COSTS> 28,317
<OTHER-EXPENSES> 0
<LOSS-PROVISION> 0
<INTEREST-EXPENSE> (1,362)
<INCOME-PRETAX> (15,601)
<INCOME-TAX> 135
<INCOME-CONTINUING> (15,736)
<DISCONTINUED> 0
<EXTRAORDINARY> 0
<CHANGES> 0
<NET-INCOME> (15,736)
<EPS-BASIC> (0.61)
<EPS-DILUTED> (0.61)
</TABLE>