I've thought for quite some time that car manufacturers were going about the whole "alternative fuels" thing the wrong way. They try to make them... cars. IMNSHO, if you make them large, full of conveniences and airbags... duh, they're going to be heavy and get lousy fuel economy or range.
In California (and most states, I believe) anything under 1500 lbs. with less than 4 wheels is considered a motorcycle, and is not subject to car standards of emissions, safety, etc.
So... any idea why it wouldn't be feasible to build a three-wheeler electric vehicle with a bunch of plain-old car batteries, on a lightweight tube frame chassis, heavy-duty bicycle running gear (MTB maybe) and a fiberglass body? You could do one that was clean enough (drag-wise) to run at freeway speeds on relatively little power, light enough (I'm thinking 1000lbs. would be easily accomplished) that the battery power would be sufficient for a decent range between charges.
With a set of LED headlamps/taillamps, it could be run at night with a minimal loss of range, though you obviously couldn't have a heater, and I'm thinking a three-seat three-wheeler should easily have a decent range... what do you think?