lol... try a keyboard splitter... if they're the same, you might get away with it
otherwise you might look at one of those kvms that you can run multiple monitor/keyboard setups off the same machine (instead of multiple machines off one keyboard). i think they're a little pricey though, and i'm not sure if they can be used at the same time (should be).
if you're trying for ergonomics though, why don't you go with a natural or some of the more fancy keyboards? they're well worth the price. but i dunno what you're trying to do