Two recent reports pour a fair amount of cold water on the biofuels issue. If you recall, I'm not convinced they are the answer to long-term sustainability, but can have some temporary benefits while the search for a solution to the two-fold problem of oil shortage and global warming continues. The first, published by the UN, starts by acknowledging the necessity of ending reliance on oil for energy needs, particularly in developing nations. But a sharp warning on the dangers of monopoly, further environmental damage in the rush to procure more agricultural land, water demands quickly emerges. Rather a dampener on proceedings. The second report was commissioned by the Co-operative insurance society (an online copy of which I've yet to look for) seems to be in general agreement, judging by the BBC article.
They make good points to ruminate on. Perhaps after Manic May is over.