I made mention prior to Olds posting I had ordered one of these to try out as well. I've had my unicomp for a little while now.
I have to agree with Olds442. Next to the original IBM mechanical, it's easily the best, due to the buckling key patent they're using from IBM. I've tried several other modern mechanicals, and while they are vastly superior to a regular keyboard, none of them capture that....clickness that the original IBM keybaords had, hence me grabbing so many of them when I was given a chance. The unicomp however is IMO the equal to the IBM in terms of keyboard "feel" while typing, and can be had new for under 100$ incl shipping. I've had no trouble playing FPS or any other game with it, and while I miss the backlit keyboard sometimes, I'm not often playing in the dark anyway. My Razers have been sitting idle since the day I unboxed the unicomp, and will continue to do so until I probably end up giving them away to somebody local who hears my whole "mechanical" speech and doesn't know wth I'm talking about.
+2 for the Unicomp.
http://www.pckeyboard.com/