<TABLE> <S> <C>

<PAGE>
<ARTICLE> 5

<S>                    <C>                    <C>                     <C>                     <C>                 <C>
<PERIOD-TYPE>                             YEAR           3-MOS             3-MOS            6-MOS             6-MOS
<FISCAL-YEAR-END>                  DEC-31-1998     DEC-31-1998       DEC-31-1999      DEC-31-1998       DEC-31-1999
<PERIOD-START>                     JAN-01-1998     APR-01-1998       APR-01-1999      JAN-01-1998       JAN-01-1999
<PERIOD-END>                       DEC-31-1998     JUN-30-1998       JUN-30-1999      JUN-30-1998       JUN-30-1999
<CASH>                              25,597,461               0        11,242,052                0                 0
<SECURITIES>                                 0               0         7,957,400                0                 0
<RECEIVABLES>                       19,570,031               0        24,377,914                0                 0
<ALLOWANCES>                       (1,908,811)               0       (1,581,197)                0                 0
<INVENTORY>                          6,826,732               0        11,337,352                0                 0
<CURRENT-ASSETS>                    73,019,623               0        78,856,070                0                 0
<PP&E>                              28,139,460               0        44,784,898                0                 0
<DEPRECIATION>                     (4,882,832)               0       (8,906,829)                0                 0
<TOTAL-ASSETS>                     185,655,529               0       201,521,709                0                 0
<CURRENT-LIABILITIES>               44,519,887               0        61,376,560                0                 0
<BONDS>                            168,267,797               0       189,097,280                0                 0
<PREFERRED-MANDATORY>                        0               0        19,206,378                0                 0
<PREFERRED>                                  0               0                 0                0                 0
<COMMON>                            27,486,554               0        36,438,015                0                 0
<OTHER-SE>                        (48,835,439)               0      (92,698,762)                0                 0
<TOTAL-LIABILITY-AND-EQUITY>       185,655,529               0       201,521,709                0                 0
<SALES>                                      0       5,559,292        21,379,903       10,275,084        37,777,883
<TOTAL-REVENUES>                             0       7,981,838        38,053,348       14,504,703        69,761,904
<CGS>                                        0       4,396,718        15,830,606        8,279,174        28,091,602
<TOTAL-COSTS>                                0       4,798,024        23,713,539       10,569,675        44,456,392
<OTHER-EXPENSES>                             0       8,901,277        31,518,396       15,569,675        44,456,392
<LOSS-PROVISION>                             0         144,180         (148,004)          144,180           754,464
<INTEREST-EXPENSE>                           0       5,830,022         6,149,357        5,882,591        12,086,022
<INCOME-PRETAX>                              0    (11,168,720)      (23,327,991)      (16,279,387)      (43,088,968)
<INCOME-TAX>                                 0               0                 0                0                 0
<INCOME-CONTINUING>                          0    (11,168,720)      (22,949,402)      (16,279,387)      (43,088,968)
<DISCONTINUED>                               0               0                 0                0                 0
<EXTRAORDINARY>                              0               0                 0                0                 0
<CHANGES>                                    0               0                 0                0                 0
<NET-INCOME>                                 0    (11,168,720)      (22,949,402)     (16,279,387)      (43,088,968)
<EPS-BASIC>                                  0          (0.82)            (1.61)           (1.20)            (3.06)
<EPS-DILUTED>                                0            0.82            (1.61)           (1.20)            (3.06)


</TABLE>