The picture below shows the motor that I'm using. I am pretty sure that it is out of one of the earlier versions of the Electric SmartCar. The motor shaft is splined on the inside and smooth on the outside. The back half where all of the wires plug in houses the inverter, DC/DC converter and is also liquid cooled.

Right now I can't use these parts because I have no way of talking to the inverter, but I plan to solicit some help in attaching my own motor controller to make the whole thing usable again.