From my alma mater, a monkey with a prosthetic arm.
If you've been watching the Net for a while, you've probably heard about the monkey in a research lab at the University of Pittsburgh that has a prosthetic arm wired directly to its brain with an implanted interface. The monkey seems to have gotten pretty good with it, too - while restrained it can use the prosthetic arm to feed itself. If you follow the link to the neuro-bio lab you can even watch it in realtime.