<ARTICLE> 5
<RESTATED> 
<MULTIPLIER> 1
<CURRENCY> U.S. DOLLARS
       
                                                                                 
<PERIOD-TYPE>                              YEAR                    YEAR                    YEAR
<FISCAL-YEAR-END>                          DEC-31-1994             DEC-31-1995             DEC-31-1996
<PERIOD-START>                             JAN-01-1994             JAN-01-1995             JAN-01-1996
<PERIOD-END>                               DEC-31-1994             DEC-31-1995             DEC-31-1996
<EXCHANGE-RATE>                                      1                       1                       1
<CASH>                                               0               9,659,017               6,002,050
<SECURITIES>                                         0                       0                       0
<RECEIVABLES>                                        0                       0                       0
<ALLOWANCES>                                         0                       0                       0
<INVENTORY>                                          0                       0                       0
<CURRENT-ASSETS>                                     0               9,917,600               6,208,065
<PP&E>                                               0               1,949,247               2,341,143
<DEPRECIATION>                                       0               (686,427)             (1,156,918)
<TOTAL-ASSETS>                                       0              11,348,849               8,486,095
<CURRENT-LIABILITIES>                                0               2,654,203               3,554,933
<BONDS>                                              0                       0                       0
<PREFERRED-MANDATORY>                                0                       0                       0
<PREFERRED>                                          0                   2,621                   3,002
<COMMON>                                             0                   1,418                   1,929
<OTHER-SE>                                           0               8,658,600               4,834,104
<TOTAL-LIABILITY-AND-EQUITY>                         0              11,348,849               8,486,095
<SALES>                                              0                       0                       0
<TOTAL-REVENUES>                             4,796,348               6,798,935               3,609,541
<CGS>                                                0                       0                       0
<TOTAL-COSTS>                                        0                       0                       0
<OTHER-EXPENSES>                             6,874,101               9,642,463              14,280,463
<LOSS-PROVISION>                                     0                       0                       0
<INTEREST-EXPENSE>                              43,017                  16,821                  18,347
<INCOME-PRETAX>                            (1,800,089)             (2,360,321)            (10,206,885)
<INCOME-TAX>                                         0                       0                       0
<INCOME-CONTINUING>                                  0                       0                       0
<DISCONTINUED>                                       0                       0                       0
<EXTRAORDINARY>                                      0                       0                       0
<CHANGES>                                            0                       0                       0
<NET-INCOME>                               (1,800,089)             (2,360,321)            (10,206,885)
<EPS-PRIMARY>                                        0                       0                  (1.55)
<EPS-DILUTED>                                        0                       0                       0