Hmm I hear this cons against a pure ethanol powered engine. Lets remember a few facts abotu it that seem to be getting over looked. Current gas engines need a 14 to 1 air to fuel ratio, alcohol needs 7 to 1, you are correct that you need 2 times as much fuel to run however you do not need to have 4 inch fuel lines you just need to make sure you have a good fuel pump and larger injectors to amke up for the difference. In carbed applications you just need to jet up your carb to make up for the difference. Fuel lines should be replaced since alcohol tends to corrode standard metal lines and will break down rubber lines.
My neighbor has a 57 Chevy with a 502, 6-71 roots blower and runs 100% alcohol. The engine makes 650 HPs and its a weekend car however the engine never overheats and at 3000 miles the oil looks like it did when it came out of the bottle. His stainless exhaust is also very, very clean.
Another note: F1 cars have been using it for many years and they get plenty of power so that shouldn't be an issue. Gas does have more energy potentail then alcohol but diesel has even more potential. All these come at a cost, more pollutants, more carbon deposits and more dependance on imported oil, Oh another myth about oil, the US #1 oil imported is not any arab country, it's a counrty right here in north america so once again the media skews the truth.
One more item, Henry Ford never had in mind to run the Model T on gas, he designed the engine for alcohol, remember he was trying to sell the car to the masses and most of the masses were farmers. He could never see the reason why cars ran on gas anyway. Maybe we should revist this and get the hell off OIL! If Barzil cn make the switch in 10 years how long do you think it would take the US, really?
Ok off my soap box! ;o)