Biomass electric generation primary uses wood and crop byproducts (so for electric, it's primarily the left overs of cane and sorghum that are used, not the crop: http://en.wikipedia.org/wiki/Bagasse ). Sugar mills wouldn't power themselves with it if it was a crapfest.
I fail to see what sugar mills have to do with the absolute idiocy of corn based ethanol. I would also be interested in the ratio of sugar mills that actually power themselves versus those that just run off the grid.
My point was that biomass electric generation can (and probably does) make sense regardless of whether corn ethanol makes sense. The rest of your comment is about electric generation, so it seemed reasonable to point out that biomass is viable for electric, especially given your blanket statement that it is a crapfest.