<TABLE> <S> <C>

<PAGE>
<ARTICLE> 5

<S>                          <C>                    <C>                     <C>                    <C>                 <C>
<PERIOD-TYPE>                        YEAR                   3-MOS                   3-MOS                   9-MOS             9-MOS
<FISCAL-YEAR-END>             DEC-31-1998             DEC-31-1998             DEC-31-1999             DEC-31-1998       DEC-31-1999
<PERIOD-START>                JAN-01-1998             JUL-01-1998             JUL-01-1999             JAN-01-1998       JAN-01-1999
<PERIOD-END>                  DEC-31-1998             SEP-30-1998             SEP-30-1999             SEP-30-1998       SEP-30-1999
<CASH>                         25,597,461                       0              57,617,429                       0                 0
<SECURITIES>                            0                       0              46,186,003                       0                 0
<RECEIVABLES>                  19,570,031                       0              30,260,496                       0                 0
<ALLOWANCES>                  (1,908,811)                       0               (979,655)                       0                 0
<INVENTORY>                     6,826,732                       0              13,213,044                       0                 0
<CURRENT-ASSETS>               73,019,623                       0             174,029,009                       0                 0
<PP&E>                         28,139,460                       0              63,656,018                       0                 0
<DEPRECIATION>                (4,882,832)                       0            (12,017,299)                       0                 0
<TOTAL-ASSETS>                185,655,629                       0             318,208,005                       0                 0
<CURRENT-LIABILITIES>          44,519,887                       0              67,966,387                       0                 0
<BONDS>                       168,267,797                       0             190,350,816                       0                 0
<PREFERRED-MANDATORY>                   0                       0                       0                       0                 0
<PREFERRED>                             0                       0                       0                       0                 0
<COMMON>                       27,486,554                       0             189,995,213                       0                 0
<OTHER-SE>                   (48,835,439)                       0           (119,827,896)                       0                 0
<TOTAL-LIABILITY-AND-EQUITY>  185,655,629                       0             318,208,005                       0                 0
<SALES>                                 0              11,591,660              24,856,140              21,866,745        62,634,023

<TOTAL-REVENUES>                        0              22,316,402              42,421,514              36,821,105       112,183,418
<CGS>                                   0                       0              18,975,556                       0        47,067,158
<TOTAL-COSTS>                           0              14,717,364              26,977,273              25,287,038        71,433,664
<OTHER-EXPENSES>                        0              18,152,870              36,798,832              33,878,432        94,517,702
<LOSS-PROVISION>                        0                 611,682                 584,161                 755,862         1,338,625
<INTEREST-EXPENSE>                      0               5,868,531               6,881,195              11,751,121        18,967,217
<INCOME-PRETAX>                         0            (15,355,480)            (23,358,236)            (31,634,867)      (69,447,204)
<INCOME-TAX>                            0                       0                       0                       0                 0
<INCOME-CONTINUING>                     0            (15,355,480)            (22,949,402)            (31,634,867)      (69,447,204)
<DISCONTINUED>                          0                       0                       0                       0                 0
<EXTRAORDINARY>                         0                       0                       0                       0                 0

<CHANGES>                               0                       0                       0                       0                 0
<NET-INCOME>                            0            (15,355,480)            (22,949,402)            (31,634,867)      (69,447,204)
<EPS-BASIC>                             0                  (1.11)                  (1.06)                  (2.31)            (3.92)
<EPS-DILUTED>                           0                  (1.11)                  (1.06)                  (2.31)            (3.92)



</TABLE>