Exhibit 12.1

Computation of ratio of earnings to fixed charges

	Year Ended December 31,
	2004 (1)		2005 (1)		2006			2007			2008
	(Dollars in thousands)
Earnings before fixed charges:
Income/(loss) from continuing operations before income taxes, minority interest and income/(loss) from equity investees	$	29,142	$	1,776	$	(32,743	)	$	(59,367	)	$	(85,319	)
Add fixed charges		1,700		15,047		12,196			13,211			14,105
Add amortization of capitalized interest		—		—		—			—			—
Add distributed income of equity investees		—		—		—			—			—
Subtract capitalized interest		—		—		—			—			—
Income/(loss) before fixed charges	$	30,842	$	16,823	$	(20,547	)	$	(46,156	)	$	(71,214	)
Fixed charges:
Interest expense	$	—	$	12,608	$	9,680		$	10,495		$	11,208
Amortization of debt issuance costs		—		739		516			516			597
Estimate of interest expense within rental expense		1,700		1,700		2,000			2,200			2,300
Preference security dividend requirements of consolidated subsidiaries		—		—		—			—			—
Total fixed charges	$	1,700	$	15,047	$	12,196		$	13,211		$	14,105
Deficiency of earnings available to cover fixed charges	$	—	$	—	$	32,743		$	59,367		$	85,319

(1) For the years ended December 31, 2005 and 2004, the ratio of earnings to fixed charges was 18 and 1, respectively.