I have a USB keyboard and connect a 4-port hub to the back end of it. My USB mouse is connecte on that hub. So, if I move my keyboard from one workstation to the next, all of my USB devices come with it. Although, I just learned that disabling the PS/2 keyboard device in Win2K is very, very bad, I've had no problems.
Of all the USB devices I have, I *think* that a USB keyboard needs to be directly connected to the motherboard instead of through a hub. But, I could be wrong.
-SUO