My girlfriend's car is dying, and as we're both in a cash crunch I've been looking at alternative transportation. She has a 3.5 mile commute to work. It dawned on me this afternoon that this can be covered inexpensively using an electric bike. What are the recommended electric bikes? It turns out that Ford's Think program is discontinuing their electric bike line and selling them off at firesale prices ($595). That's got a 22 mile range per charge. Is there anything better+cheaper?

Calvin