I just wanted to say that I picked up the iogear G-CS104U, and it works great between my Windows 2000 PC & my Cube. Still leaves room for expansion as well.
I also had no problems accesing BIOS setup routine, etc. on the PC.
The delay when switching from machine to machine ranges from 5-10 seconds for the PC, to roughly instantaneous on my Cube.
A great piece of hardware, with 4 nice cable sets included, for roughly a hundred bucks (after rebate at buy.com)