Cheap electric bike: Currie Ezip Trailz
See the original posting on Boing Boing
This is the electric bike I recommend for anyone on a tight budget. The Ezip Trailz is a bargain in terms of how much it can affect your life on little dollars. It is by far the best selling electric bike in the United States, for good reason: For less than $500 it is a decent electric bike with reasonable performance. At this price point if you just ride the bike regularly it will pay for itself quickly.