Don't get me wrong... the idea of trying to come up with alternative fuels isn't a bad thing... but its not there yet... ethanol in my opinion doesn't work very well... from a practical standpoint... it simply does not have a high enough energy content. along with the other issues it has..
Hydrogen based setups.. first being potentially dangerous because unless its in a liquid state requires it to be stored as a gas at high pressure. same risks as CNG has.. that and theres the "water" problem.. H + O = energy output and water.
since the exhaust from hydrogen is water, if we use it as a primary fuel source, what are we going to do with all the water? and since it creates water, in areas where the temperature drops below freezing.. that water is going to collect on the roadway and freeze... be like driving constantly during an ice storm if the traffic flow is dense enough and its below freezing.. not to mention when it warms up, its going to mix with the dirt on the road and constantly be thrown up on your windshield...
Hybrids and electrics... most of those are just too damn expensive to be practical. and with some of them .. well unless all you do is put around town.. you can only drive so far before you have to recharge, and that takes too long to do right now.. get it where you can drive an electric up to 500 miles on a charge at 80 MPH and when recharging is needed you can fully recharge in 5 minutes... then it might work..
The only one i've seen so far that works the best is probably that Bio/Soy Diesel stuff... That seems to be the most practical one so far. It'll work in almost every diesel engine with minimal modification, and produces acceptable power and efficiency. and its cheap enough...
Maybe instead of trying to force ethanol, maybe instead use a blend of soy oil/ corn oil and other vegetable/animal based diesel blends with some petrol based diesel mixed in to it.. and start building diesel engines that can burn almost anything that can atomize.