Robert Rapier is viewed as a relentless foe by the ethanol industry, but I don't see him that way. His analysis of the business is detailed and well cited; if this displeases those involved the problem lies in the fundamentals, not in the fact that he takes the time to analyze the economics of the fuel.
Robert recently came across with a very well researched post over at The Oil Drum and it deserves a read by anyone interested in the agriculture or energy markets.