<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE AUDITED
FINANCIAL STATEMENTS FOR THE YEARS ENDED DECEMBER 31, 1996 AND 1997 UNAUDITED
FINANCIAL STATEMENTS FOR THE QUARTERS ENDED MARCH 31, 1997, JUNE 30, 1997 AND
SEPTEMBER 30, 1997 AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH 
FINANCIAL STATEMENTS.
</LEGEND>
<RESTATED> 
<MULTIPLIER> 1,000
       
                                                                                               
<PERIOD-TYPE>                   YEAR              3-MOS               YEAR               9-MOS               6-MOS
<FISCAL-YEAR-END>                   DEC-31-1996        MAR-31-1997        DEC-31-1997         DEC-31-1997         DEC-31-1997
<PERIOD-START>                      JAN-01-1996        JAN-01-1997        JAN-01-1997         JAN-01-1997         JAN-01-1997
<PERIOD-END>                        DEC-31-1996        MAR-31-1997        DEC-31-1997         SEP-30-1997         JUN-30-1997
<CASH>                                    6,248              7,162            109,810              44,687              47,700
<SECURITIES>                                  0                  0             15,256               3,494               8,692
<RECEIVABLES>                                 0                  0                  0                   0                   0
<ALLOWANCES>                                  0                  0                  0                   0                   0
<INVENTORY>                                 571                939              8,971               2,732               1,652
<CURRENT-ASSETS>                          7,140              9,038            137,335              52,697              59,206
<PP&E>                                    1,295              3,221             12,899               6,710               4,896
<DEPRECIATION>                              310                730              3,634               2,307               1,332
<TOTAL-ASSETS>                            8,271             11,722            149,006              57,447              63,098
<CURRENT-LIABILITIES>                     4,870              8,959             43,818              19,848              17,357
<BONDS>                                       0                  0                  0                   0                   0
<PREFERRED-MANDATORY>                         0                  0                  0                   0                   0
<PREFERRED>                                   6                  6                  0                   0                   0
<COMMON>                                    318                347                479                 477                 477
<OTHER-SE>                                3,077              2,410             28,007              36,941              45,083
<TOTAL-LIABILITY-AND-EQUITY>              8,271             11,722            149,006              57,447              63,098
<SALES>                                  15,746             16,005            147,758              81,747              43,860
<TOTAL-REVENUES>                         15,746             16,005            147,758              81,747              43,860
<CGS>                                    12,287             12,484            118,945              65,826              35,117
<TOTAL-COSTS>                            12,287             12,484            118,945              65,826              35,117
<OTHER-EXPENSES>                          9,438              6,623             58,022              35,276              18,912
<LOSS-PROVISION>                              0                  0                  0                   0                   0
<INTEREST-EXPENSE>                            0                  0                279                   0                   0
<INCOME-PRETAX>                         (5,777)            (3,038)           (27,590)            (18,253)             (9,743)
<INCOME-TAX>                                  0                  0                  0                   0                   0
<INCOME-CONTINUING>                     (5,777)            (3,038)           (27,590)            (18,253)             (9,743)
<DISCONTINUED>                                0                  0                  0                   0                   0
<EXTRAORDINARY>                               0                  0                  0                   0                   0
<CHANGES>                                     0                  0                  0                   0                   0
<NET-INCOME>                            (5,777)            (3,038)           (27,590)            (18,253)             (9,743)
<EPS-PRIMARY>                            (0.31)             (0.16)             (1.27)              (0.86)              (0.48)
<EPS-DILUTED>                            (0.31)             (0.16)             (1.27)              (0.86)              (0.48)