<TABLE> <S> <C>
<PAGE>
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
REGISTRANT'S REPORT ON FORM 10-Q FOR THE THREE MONTHS ENDED OCTOBER 31, 2000,
AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<S> <C> <C>
<PERIOD-TYPE> 3-MOS 3-MOS
<FISCAL-YEAR-END> JUL-31-2001 JUL-31-2000
<PERIOD-START> AUG-01-2000 AUG-01-1999
<PERIOD-END> OCT-31-2000 OCT-31-1999
<CASH> 243,056,599 57,874,228
<SECURITIES> 236,611,470 59,142,518
<RECEIVABLES> 12,237,733 9,754,931
<ALLOWANCES> 0 0
<INVENTORY> 6,061,574 3,216,783
<CURRENT-ASSETS> 435,778,883 156,022,936
<PP&E> 78,402,805 68,922,441
<DEPRECIATION> (11,616,545) (9,055,287)
<TOTAL-ASSETS> 702,794,924 411,728,433
<CURRENT-LIABILITIES> 44,306,535 49,650,957
<BONDS> 0 0
0 0
0 0
<COMMON> 605,844 555,218
<OTHER-SE> 604,876,378 331,331,328
<TOTAL-LIABILITY-AND-EQUITY> 702,794,924 411,728,433
<SALES> 0 0
<TOTAL-REVENUES> 30,809,070 13,136,918
<CGS> 18,711,267 6,834,111
<TOTAL-COSTS> 59,104,469 22,588,731
<OTHER-EXPENSES> 0 0
<LOSS-PROVISION> 0 0
<INTEREST-EXPENSE> 0 0
<INCOME-PRETAX> (5,172,479) (8,365,270)
<INCOME-TAX> 0 0
<INCOME-CONTINUING> (5,172,479) (8,365,270)
<DISCONTINUED> 0 0
<EXTRAORDINARY> 0 0
<CHANGES> 0 0
<NET-INCOME> (5,172,479) (8,365,270)
<EPS-BASIC> (0.09) (0.17)
<EPS-DILUTED> (0.09) (0.17)
</TABLE>