
<TABLE> <S> <C>

<ARTICLE> 5
<MULTIPLIER> 1
<CURRENCY> U.S. DOLLARS
       
<S>                             <C>                     <C>                      <C>                    <C>
<PERIOD-TYPE>                   YEAR                    YEAR                     YEAR                   6-MOS
<FISCAL-YEAR-END>                        DEC-31-1993               DEC-31-1994             DEC-31-1995           DEC-31-1996
<PERIOD-START>                           JAN-01-1993               JAN-01-1994             JAN-01-1995           JAN-01-1996
<PERIOD-END>                             DEC-31-1993               DEC-31-1994             DEC-31-1995           JUN-30-1996
<EXCHANGE-RATE>                                    1                         1                       1                     1
<CASH>                                             0                 7,802,275               9,659,017             8,760,884
<SECURITIES>                                       0                         0                       0                     0
<RECEIVABLES>                                      0                         0                       0                     0
<ALLOWANCES>                                       0                         0                       0                     0
<INVENTORY>                                        0                         0                       0                     0
<CURRENT-ASSETS>                                   0                   313,603                 258,583               213,752
<PP&E>                                             0                 1,745,264               1,949,247             2,080,009
<DEPRECIATION>                                     0                 (356,720)               (686,427)             (919,301)
<TOTAL-ASSETS>                                     0                 9,684,295              11,348,849            10,280,816
<CURRENT-LIABILITIES>                              0                 2,250,782               2,654,203             2,495,183
<BONDS>                                            0                         0                       0                     0
<PREFERRED-MANDATORY>                              0                         0                       0                     0
<PREFERRED>                                        0                     2,092                   2,621                 2,811
<COMMON>                                           0                       961                     964                 1,295
<OTHER-SE>                                         0                 5,436,145               8,659,054             7,745,028
<TOTAL-LIABILITY-AND-EQUITY>                       0                 9,684,295              11,348,849            10,280,816
<SALES>                                            0                         0                       0                     0
<TOTAL-REVENUES>                             230,000                 4,796,348               6,798,935             2,605,721
<CGS>                                              0                         0                       0                     0
<TOTAL-COSTS>                                      0                         0                       0                     0
<OTHER-EXPENSES>                           3,695,351                 6,874,101               9,642,463             6,991,129
<LOSS-PROVISION>                                   0                         0                       0                     0
<INTEREST-EXPENSE>                            76,001                    43,017                  16,821                 8,302
<INCOME-PRETAX>                          (3,515,466)               (1,800,089)             (2,360,321)           (4,157,531)
<INCOME-TAX>                                       0                         0                       0                     0
<INCOME-CONTINUING>                                0                         0                       0                     0
<DISCONTINUED>                                     0                         0                       0                     0
<EXTRAORDINARY>                                    0                         0                       0                     0
<CHANGES>                                          0                         0                       0                     0
<NET-INCOME>                             (3,515,466)               (1,800,089)             (2,360,321)           (4,157,531)
<EPS-PRIMARY>                                      0                         0                  (0.55)                (0.93)
<EPS-DILUTED>                                      0                         0                       0                     0
        








































</TABLE>
