In this cause the farming interests have ready made allies in the environmentalist movement and and global warming crowd. But their support might be misplaced. The bloom is coming off the biofuel rose. Several reports, including a November 2007 article in Smithsonian, indicate that the creation of some biofuels is worse for the environment than burning gasoline.
I believe in the family farm and farmers. But I also believe in the free market. The market should drive commodity prices (and, remember, is already driving them up), governments shouldn't drive prices on anything. And before even beginning to consider meddling in the market, governments should be sure of their science.