Don't forget about the openining of the Mato Grosso in Brazil.  Previously not open to soybeans, improvements in ag tech have allowed this area to develop tremendously in the past 10 years. And dump soy onto the world market.  That's part of why Brazil doesn't starve because of its biofuels.

The other two are:

1) Sugarcane is a lot more energy effective than corn making fuel.

and most important, which I'm sure Jerome will point out

2) Brazil has upped its oil production in the last decade.  If they bring the fields the Oil Drum has listed online, they will be pumping 5 million barrels or so a day.

And I'll give my consent to any government that does not deny a man a living wage-Billy Bragg