I have read, in many sources, that ethanol doesn't provide more energy than it takes to create it:
http://unisci.com/stories/20013/0813012.htm
http://www.straightdope.com/columns/031128.html
And to show how wasteful the program has been:
http://www.cato.org/dailys/7-10-97.html
I would love to see a renewable green energy source, but from what I have read, ethanol is not that source.