EXHIBIT 12.1

COMPUTATION OF RATIOS OF EARNINGS TO FIXED CHARGES

		Year Ended December 31,
		2004			2005			2006			2007			2008
		(in thousands)
Net income (loss) before income taxes		$	(164,364	)	$	(103,595	)	$	(74,166	)	$	(86,881	)	$	(178,920	)
Fixed charges			19,450			17,426			19,362			25,553			26,537
	Total earnings and fixed charges		(144,914	)		(86,169	)		(54,804	)		(61,328	)		(152,383	)
Fixed charges			19,450			17,426			19,362			25,553			26,537
Ratio of earnings to fixed charges(1)(2)			NM			NM			NM			NM			NM

(1)

The ratio of earnings to fixed charges is computed by dividing loss before taxes plus fixed charges by fixed charges. Fixed charges consist of interest expense (including interest expense from capital leases) and the estimated portion of rental expense deemed by us to be representative of the interest factor of rental payments under operating leases, plus amortization of debt issuance expenses. Earnings were insufficient to cover fixed charges by $164.4 million, $103.6 million, $74.2 million, $86.9 million and $178.9 million for the years ended December 31, 2004, 2005, 2006, 2007 and 2008 respectively.

(2)

NM—Not meaningful.