Unlike gasoline, where there is a limited supply, ethanol can be made from items of which we have an abundance and can always grow more -- vegetables, more specifically corn or sugar and other feedstock. Moreover, the engines that are being used in today's cars can burn ethanol and thus avoiding conversion kits or other modifications. And, finally, cars can switch back to good old gasoline any times there's no ethanol pump to be around (and there are very, very few pumps at the moment.)
The Car Connection came up with a list of vehicles available right now that can burn ethanol and gas. They include: