The Chevy Volt, an electric concept car, was unveiled at the Detroit Auto Show recently. The debate surrounding the car was whether it was feasible. It was explained that the battery technology in the car was not ready for production. Autoblog Green has a good article summing it up and linking to both sides of the debate.
They also have a good post about vegetable oil as a fuel emission testing. It is technical but very important in the development of alternative fuels.