If you're looking for a cheap, energy efficient way to get around the city, an electric vehicle may be just your (canvass) bag.
Light, or neighborhood, electric vehicles run entirely on a battery and have a range of about 30 to 40 miles per charge. They are street legal, but you can't take them on the highways.
Matra's concept model even has a bicycle with an electric motor that folds up into the LEV, so you always have two options to get around. Both the LEV and the bike recharge with through a solar panel on the LEV's roof.
If you're thinking seriously about getting an LEV but are worried about the cost, don't forget the 10 percent federal tax credit you'll get if you buy one before 2011.