I could see there being a shortage in small towns but big cities I doubt that would happen. When the price of fuel goes back down or the average person gets used to the high prices I bet lots will lose intrest. Somewhere I saw somebody post that they got a quote for something like $168 a gallon for virgin soybean oil. The only catch was you have to buy 500 gallons at a time. It would still be cheaper than diesel and you would not have to worry about filtering and water contamination.
I have also thought about that if all the restraunts were being cleaned out you could offer a few bucks to take it. I have trouble sleeping so I have been thinking about veggy oil. I guess you could say I am more than a bus nut