Unfortunately this WSJ piece is subscriber only, but here’s the gist of it:

The biofuels revolution that promised to reduce America’s dependence on foreign oil is fizzling out.
Two-thirds of U.S. biodiesel production capacity now sits unused, reports the National Biodiesel Board. Biodiesel, a crucial part of government efforts to develop alternative fuels for trucks and factories, has been hit hard by the recession and falling oil prices.
The global credit crisis, a glut of capacity, lower oil prices and delayed government rules changes on fuel mixes are threatening the viability of two of the three main biofuel sectors — biodiesel and next-generation fuels derived from feedstocks other than food.

But don’t worry, another taxpayer bailout is on the way:

Producers and investors now are pushing for swift and aggressive government help. Biodiesel makers are lobbying to kick-start the delayed blending mandates immediately and extend biodiesel tax credits, which expire in December.
On Aug. 7 more than two dozen U.S. senators wrote to President Barack Obama to warn that “numerous bankruptcies loom” in the biodiesel sector. “If this situation is not addressed immediately, the domestic biodiesel industry expects to lose 29,000 jobs in 2009 alone,” the senators wrote, using estimates by the National Biodiesel Board.
Mr. Obama, who supported biofuels throughout his campaign, is working to roll out grants and loan guarantees for bio-refineries and green fuel projects, said Heather Zichal, a White House energy adviser. The pace of the disbursements should speed up this fall, administration officials say.