Feeding the world in 2008 - biofuels or bread?

Food prices are up 40% this year, leading the UN to warn that the world may face unprecendented food shortages in 2008, due to a combination of bad weather, a rise in meat eating, and the large-scale growth of biofuels. As many parts of the world experience rationing or rioting, can we possibly subsidise maize for our cars?