I've been very happy with keyclone for WoW, but I probably can't expect him to support multiboxing for every game that I play.

I've been doing research on hardware solutions, and in Xzin's helpful guide it is clear that he prefers PS/2 over USB. That was written over a year ago I believe, and looking around, it seems like there are both USB multicasters and USB KVM switches. PS/2 models are still available.

I'm a little concerned that if I do go the PS/2 route, all of this hardware might not work with the next PC I build. Perhaps that's an overreaction -- floppy drives were written off for dead more than 10 years ago and if you want to have one, it's still possible to do.

Generally though, I'm very happy with all of USB peripherals and would prefer not to switch. So, I guess the question is -- is there anyone out there using USB for hardware multiboxing and are they satisfied with their results?