Zero Pollution Motors plans to drop the AirPod like it's hot. And soon (~2011). The compressed-air powered vehicle will cost about $20,000 (!) and run on little more than, well, air. Oh, and, alternatively, a little oil, alcohol, or gas.
The air car can tool along at a top speed of 35 mph for some 60 miles or so on a tank of compressed air, a sufficient distance for 80% of consumers to commute to work and back and complete daily chores.
On highways, the CAV can cruise at interstate speeds for nearly 800 miles with a small motor that compresses outside air to keep the tank filled. The motor isn't finicky about fuel. It will burn gasoline or diesel as well as biodiesel, ethanol or vegetable oil.