Charlie,
I guess I would like to see where you got that since everything I have read on ethanol shows that corn to gas is more expensive and uses more energy to product an inferior product in the end.
On switchgrass, we don't have the enzyme technology in place to have large scale plants readily available....
Sugar cane is what makes Brazil go, however, they can grow more because of their climate, however, check out what is happening, in attempts to cash in, the are using marginal land, jungles being converted to ag land (pretty much what Carl is afraid of....)
Then look at India, they are using HEMP as their crop to create biodisel. Only problem is in the US they think everyone wants to just smoke ditchweed...But it has greater value on the engery scales than switch or cane and definitely corn.
Way to go Andrew, get us all riled up....