Erston writes "It seems as if this could really make it to market. Mad Catz is working on a game controller that will zap you with electrodes when you are on the receiving end of your enemies' weapon. The story is here. I hope the zapper will work without the controller- I'm a keyboard/mouse fragger myself. But the more senses that I can get involved in Quake, the better-- There is also an interesting trivia piece on the bottom of the page that talks about electroshock/bio(force)feedback and how it relates to a chimpanzee in the pre-manned spaceflight era of NASA. . . "
I've been using similiar technology to train CowboyNeal to get me coffee/cookies/girls and so far it hasn't been successful, but this appears to be much more practical.