"It is important to understand that the price of biodiesel is an "honest price". There are no hidden taxpayer fees unlike with petroleum diesel. The true cost of a gallon of petroleum fuel has been evaluated at $5.00-$14.00+ per gallon. This high "real" cost is due to things such as taxpayer-financed subsidies to the petroleum industry and the guarding of our pipelines by the military. The potential of the "real" price of petroleum going even higher increases as we aggressively use the military to protect "our" oil supply. We think it is a safe assumption that the price of petroleum will continue to climb. Thankfully, there is no reason to assume the same with biodiesel."
News and information about Biodiesel & alternative fuels.
The Real Cost of Petroleum
Via Jon's blog, here's a FAQ from Yokayo Biofuels: