Volkswagen's 1 liter car looks promising
Volkswagen has released some information about their 1 liter per 100km car that will supposedly debut in 2010, and I have to say it looks cool:
It provides the combination of compactness and fuel economy that usually only motorcycles reach, and at the same time protects from the elements. As I've always loved the old Messerschmitt mini-cars it resembles I may be strongly tempted when it comes out.
At one liter, the mileage is even better than with my current extremely economical Royal Enfield...