Orient Tandem Pacer

This thing is super wierd.  I believe it's some sort of assisted-pedaling machine.

Link.

Electric Self-Balancing Unicycle

Woah!

Track Bike

*SnareTom Crash*

Lolz.

Link.

Derringer Motor Bicycle

Nicest motor-bike ever.  Based on the original model.  This is one sexy bike.

Link.

Columbia Motorized and Non-Motorized Trikes on CL Huntsville

I know the picture is terrible, but it still seemed worth posting. 

Link.

Motorized MTB on Birmingham CL

Too cool.  The seller says that they will install a motor on your bike for $350.

Link.