<TABLE> <S> <C>

<PAGE>
<ARTICLE> 5
<RESTATED> 
       
<S>                             <C>                     <C>                     <C>
<PERIOD-TYPE>                   3-MOS                   3-MOS                   3-MOS
<FISCAL-YEAR-END>                          JAN-03-1998             JAN-03-1998             JAN-03-1998
<PERIOD-START>                             JAN-01-1997             APR-01-1997             JUL-01-1997
<PERIOD-END>                               MAR-31-1997             JUN-30-1997             SEP-30-1997
<CASH>                                       4,168,785               3,082,780              29,604,127
<SECURITIES>                                 4,044,992               1,001,881                       0
<RECEIVABLES>                                        0                       0                       0
<ALLOWANCES>                                         0                       0                       0
<INVENTORY>                                          0                       0                       0
<CURRENT-ASSETS>                             8,300,942               4,149,814              29,631,718
<PP&E>                                         346,908                 528,272                 888,047
<DEPRECIATION>                                  93,296                 114,312                 114,312
<TOTAL-ASSETS>                               9,024,919               8,221,985              34,409,277
<CURRENT-LIABILITIES>                          368,352                 646,841                 892,183
<BONDS>                                              0                       0                       0
<PREFERRED-MANDATORY>                                0                       0                       0
<PREFERRED>                                     46,000                  46,000                       0
<COMMON>                                        83,366                  83,366                 129,980
<OTHER-SE>                                   8,527,201               7,435,778              33,387,114
<TOTAL-LIABILITY-AND-EQUITY>                 9,024,919               8,211,985              34,409,277
<SALES>                                              0                       0                       0
<TOTAL-REVENUES>                                     0                       0                       0
<CGS>                                                0                       0                       0
<TOTAL-COSTS>                                1,078,554               1,162,687               1,754,890
<OTHER-EXPENSES>                                     0                       0                       0
<LOSS-PROVISION>                                     0                       0                       0
<INTEREST-EXPENSE>                               1,688                   1,646                   6,016
<INCOME-PRETAX>                              (989,760)             (1,091,420)             (1,462,720)
<INCOME-TAX>                                         0                       0                       0
<INCOME-CONTINUING>                                  0                       0                       0
<DISCONTINUED>                                       0                       0                       0
<EXTRAORDINARY>                                      0                       0                       0
<CHANGES>                                            0                       0                       0
<NET-INCOME>                                 (989,760)             (1,091,420)             (1,462,720)
<EPS-PRIMARY>                                    (.17)                   (.19)                   (.13)
<EPS-DILUTED>                                    (.17)                   (.19)                   (.13)
        

</TABLE>