This is a pretty cool idea. An electric motorcycle capable of 50 mile round trips and a top speed of about 50 miles per hour. It is called the Enertia Bike. It is about perfect for a non-highway commute. Read an MSN article about it that has some pretty cool photos.
The price point on both seems a bit high, but maybe in the next year or two they will get more reasonable. Or there is always the lotto.