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<TABLE> <S> <C>
<PAGE>
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
COMPANY'S CONSOLIDATED FINANCIAL STATEMENTS FOR THE QUARTERLY PERIODS ENDED JUNE
30, 1999, AND JUNE 30, 2000, AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO
SUCH CONSOLIDATED FINANCIAL STATEMENTS.
</LEGEND>
<S> <C> <C>
<PERIOD-TYPE> 6-MOS 6-MOS
<FISCAL-YEAR-END> DEC-31-1999 DEC-31-2000
<PERIOD-END> JUN-30-1999 JUN-30-2000
<CASH> 12,355,309 135,863,898
<SECURITIES> 0 0
<RECEIVABLES> 5,763,935 1,386,262
<ALLOWANCES> 0 0
<INVENTORY> 77,231 0
<CURRENT-ASSETS> 20,425,383 144,197,070
<PP&E> 4,471,865 7,763,625
<DEPRECIATION> 1,938,096 (3,261,965)
<TOTAL-ASSETS> 29,055,288 166,304,904
<CURRENT-LIABILITIES> 3,913,531 1,790,135
<BONDS> 4,679,462 0
0 0
0 0
<COMMON> 4,128,045 5,055,117
<OTHER-SE> 16,334,250 156,387,056
<TOTAL-LIABILITY-AND-EQUITY> 29,055,288 166,304,904
<SALES> 854,507 1,902,656
<TOTAL-REVENUES> 854,507 1,902,656
<CGS> 80,512 694,712
<TOTAL-COSTS> 7,425,076 14,447,177
<OTHER-EXPENSES> 5,439,009 1,669,526
<LOSS-PROVISION> 0 0
<INTEREST-EXPENSE> 521,617 270,015
<INCOME-PRETAX> 0 0
<INCOME-TAX> 0 0
<INCOME-CONTINUING> (12,487,858) (11,802,369)
<DISCONTINUED> 0 0
<EXTRAORDINARY> 0 (1,411,139)
<CHANGES> 0 0
<NET-INCOME> (12,982,289) (12,735,611)
<EPS-BASIC> (0.36) (0.28)
<EPS-DILUTED> (0.36) (0.28)
</TABLE>
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