I went to the Custom Cruiser show in Dallas on Sunday, and four electric bikes were represented- thought y'all might be interested. Don't ask me details if you can't tell by looking, though.
Xtracycle conversion bike:
I think the guy was saying that the battery was in the front hub, motor in the rear on this one:
"be careful this rando stuff is addictive and dan's the 'pusher'."