Mister 4X4, an excellent, refreshingly optimistic post! Have checked into a few current methods that are available now, and that may soon be in production. The hydrogen fuel cell is a great contender, and Honda, and perhaps a few others, e.g., BMW-(has about ten cars in service now on trial in the United States for about 18 months) all are seriously into this energy source, with trials set by Honda for July 2008-model of car now in Honda line-up on line. California is making a push for this fuel source, i.e., with planned fuel stations for some highways.
The Atomic powered car has been a dream since the 1950 ties-unfortunately, radiation containment costs exceeded what engineers had theorized about initially. Do think this is a very viable way to go with different atomic fuels that are being worked on today, and are currently in process, e.g., one new fuel (small pebble configuration) is being principally addressed by China, with the United States and Canada as partners in this enterprise-for more information Goggle this article, about a year old, and was posted on 4peeps. These atomic pebbles are to be used in many different types of units, and equipment-automotive included, particularly because of safety issue concerns-lower radiation rates. Below, is an article that goes a little more into various fuels for autos-but is primarily concerned with Hydrogen as an energy source.
http://en.wikipedia.org/wiki/Hydrogen_vehicle