For an insight into how the ethanol/agribusiness lobby works, take a look at this:
Archer Daniels Midland: A Case Study In Corporate Welfare
It was produced by the Cato Institute, a free market/libertarian think tank. Ethanol ain't the only product that has gotten increased market share for all the wrong reasons. Ever wonder why high fructose corn syrup has replaced cane sugar as the sweetener of choice for soft drinks and processed foods? The Cato study was written in 1995, and some of the consequences it predicts, like inflated grain prices as more corn goes to ethanol production, have already occurred. Interesting reading if you have a few minutes.
Dave