First, a little intro: I think the whole ethanol from food crops idea is extremely misbegotten. Biodeisel is a much better idea. Ecogeek gives the "run down" on another better idea - a plant to be built in Georgia that instead uses cellulose to create ethanol. From the article:
Cellulosic ethanol can contain up to 16 times more energy than is required to create it! If that doesn't sound ridiculously impressive, consider that gasoline contains only 5 times more energy than was required to create it and corn ethanol is totally lame, containing only 1.3 times the energy required to create it.