I got a PM the other day regarding some of the 1 button power up commercial solutions out there and noticed that eightbit's original post about the Sears one was incomplete because the pic is missing due to his host not being up ...
Anyways... I went out and snagged one:

It's part #924031 (you can look it up on Sears.com if you like -- they have a goofy session info encoded in their urls so copy pasting seems like a bad idea) It's a craftsman Automatic Power Switch - "auto switch". I picked mine up at a dedicated sears hardware store (although have seen 'em in regular sears). It's on a peg near the circular saw blades n' stuff (not in electrical sections go figure) it was $19.99 ... it plugs right into the outlet so you may or may not want to get a 6 foot extension cord depending on how anal you are about only having 1 cord exit your cabinet.
*Shrug* I plugged it in... plugged my PC power supply cord into the "main" ... plugged my surge suppressor into the accessories... flipped the mode switch. and then I hit the momentary contact switch that turns on my PC and Voila! It came to life...
Rampy