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<TABLE> <S> <C>
<PAGE>
<ARTICLE> 5
<LEGEND>
THIS RESTATED FINANCIAL DATA SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION
EXTRACTED FROM FORM S-1 REGISTRATION STATEMENT AND IS QUALIFIED IN ITS ENTIRETY
BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<RESTATED>
<MULTIPLIER> 1,000
<S> <C> <C> <C>
<PERIOD-TYPE> YEAR YEAR YEAR
<FISCAL-YEAR-END> DEC-31-1999 DEC-31-1998 DEC-31-1997
<PERIOD-START> JAN-01-1999 JAN-01-1998 JAN-01-1997
<PERIOD-END> DEC-31-1999 DEC-31-1998 DEC-31-1997
<CASH> 7,085 6,883 762
<SECURITIES> 6,728 3,047 7,461
<RECEIVABLES> 833 344 532
<ALLOWANCES> 0 25 0
<INVENTORY> 0 0 0
<CURRENT-ASSETS> 15,202 10,408 8,963
<PP&E> 3,751 3,198 2,563
<DEPRECIATION> 2,252 2,064 1,718
<TOTAL-ASSETS> 17,375 12,038 9,910
<CURRENT-LIABILITIES> 5,464 3,943 1,492
<BONDS> 0 0 0
0 0 0
12 9 8
<COMMON> 1 1 1
<OTHER-SE> 5,556 2,769 8,297
<TOTAL-LIABILITY-AND-EQUITY> 17,375 12,038 9,910
<SALES> 0 0 0
<TOTAL-REVENUES> 3,719 866 793
<CGS> 0 0 0
<TOTAL-COSTS> 16,332 10,957 8,184
<OTHER-EXPENSES> 0 2 0
<LOSS-PROVISION> 0 0 0
<INTEREST-EXPENSE> 351 41 47
<INCOME-PRETAX> (12,518) (9,773) (7,163)
<INCOME-TAX> 0 600 0
<INCOME-CONTINUING> (12,518) (10,373) (7,163)
<DISCONTINUED> 0 0 0
<EXTRAORDINARY> 0 0 0
<CHANGES> 0 0 0
<NET-INCOME> (12,518) (10,373) (7,163)
<EPS-BASIC> (13.54) (16.48) (21.37)
<EPS-DILUTED> (13.54) (16.48) (21.37)
</TABLE>
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