<TABLE> <S> <C>
<PAGE>
<ARTICLE> 5
<S> <C> <C> <C> <C>
<PERIOD-TYPE> YEAR YEAR 9-MOS YEAR
<FISCAL-YEAR-END> DEC-31-1998 DEC-31-1999 SEP-30-2000 DEC-31-1997
<PERIOD-START> JAN-01-1998 JAN-01-1999 JAN-01-2000 JAN-31-1997
<PERIOD-END> DEC-31-1998 DEC-31-1999 SEP-30-2000 DEC-31-1997
<CASH> 17,499,487 1,821,945 14,312,223 0
<SECURITIES> 0 5,986,918 5,267,582 0
<RECEIVABLES> 0 319,051 1,994,439 0
<ALLOWANCES> 0 0 0 0
<INVENTORY> 0 0 0 0
<CURRENT-ASSETS> 17,617,559 8,518,662 22,629,552 0
<PP&E> 1,580,949 2,219,435 3,543,923 0
<DEPRECIATION> (715,278) (1,209,589) (1,716,230) 0
<TOTAL-ASSETS> 18,608,230 9,673,601 26,569,695 0
<CURRENT-LIABILITIES> 792,691 1,111,226 2,798,382 0
<BONDS> 0 0 0 0
0 0 0 0
31,476,099 31,476,099 58,541,015 0
<COMMON> 2,183 2,310 2,773 0
<OTHER-SE> (14,142,252) (23,016,034) (35,044,370) 0
<TOTAL-LIABILITY-AND-EQUITY> 18,608,230 9,673,601 26,569,695 0
<SALES> 85,450 468,220 5,139,795 327,780
<TOTAL-REVENUES> 85,450 468,220 5,139,795 327,780
<CGS> 0 0 0 0
<TOTAL-COSTS> 0 0 0 0
<OTHER-EXPENSES> 5,992,813 9,986,010 18,356,319 5,470,334
<LOSS-PROVISION> 0 0 0 0
<INTEREST-EXPENSE> (121,946) (76,128) (32,112) (29,239)
<INCOME-PRETAX> (5,562,383) (8,967,915) (12,708,002) (5,055,249)
<INCOME-TAX> 0 0 0 0
<INCOME-CONTINUING> (5,562,383) (8,967,915) (12,708,002) (5,055,249)
<DISCONTINUED> 0 0 0 0
<EXTRAORDINARY> 0 0 0 0
<CHANGES> 0 0 0 0
<NET-INCOME> (5,562,383) (8,967,915) (29,224,576) (5,055,249)
<EPS-BASIC> (3.47) (4.95) (13.26) (3.40)
<EPS-DILUTED> (3.47) (4.95) (13.26) (3.40)
</TABLE>