I am indebted to Camp Biche for the idea that rising commodity prices will make you thinner. The argument goes that using more corn for ethanol will reduce the amount of corn syrup available to sweeten US beverages. And this will make people thin. Sounds plausible as long as the soft drinks business doesn't switch to other sugars... Anyway it probably does for any chance of a lipodisel industry kicking off in the US. Thanks to Sustainability blog for that.