cool old ebike on ebay.

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&ih=008&sspagename=STRK%3AMEWA%3AIT&viewitem=&item=180138492139&rd=1,1

or search on 180138492139

1946-48 Simplex Servi cycle,servicycle,electric powered. needs a bigger hub motor to make it really cruse.

That's pretty cool. Very retro.
The big empty spot in the frame is screaming for more batteries.

Man that's nice. My wife's been thinking about an electric scooter (since she doesn't like the high center of gravity of an e-bike) and this might be perfect. Like you said, that open space would be perfect for batteries and would lower the center of gravity even more.