My Avocent Switchview MP KVM Switch came in yesterday.  I've hooked it up, and can now control my Windows XP box, my iBook, and my Linux mail server all from one workstation, plus whatever random faculty machine I'm re-building at the time.  It works pretty well, but I'm getting some ghosting on my display, and it's annoying me.  Apparently, there's a VAD-12 adapter that they make to deal with resolutions above XGA, and I've got a rep working on finding that now...