See, and I don't subscribe to the "there's too much of it, so that must be bad" line of thinking. Corn is a product, like anything else. You cannot feed cattle on grass alone because it's not sustainable, not as much beef as we go through in this country. I don't see the problem with corn fuel at all.
Corn, like soy, is easy to grow, cheap and abundant. That's why we use it instead of crops that are hard to grow, expensive, and in limited production. It just makes more sense. And if we start messing with that, we make all sorts of products more expensive, which will bring on a new set of problems.
Corn is like the new DDT. There's been nothing wrong with it, no problems, then some hippie came along and demonized it, with adverse results and unintended consequences.