It probably means he's using http://synergy2.sourceforge.net/ - I've used it for similar things (typing on a Mac laptop, with a second monitor hooked up to a Linux desktop) and it's a brilliant solution.
* Make it peer to peer instead of client/server, keyboard & mouse events from all peers are shared, not just the server's
* Use mDNS (e.g. Bonjour) to auto-detect nearby peers and auto-connect to known ones. Also, use some kind of authentication - you don't want random people on a public wifi to be able to get access to your clipboard because you forgot to quit your synergy client.
Alas, I haven't had the time. Maybe this summer...
Me too, but Synergy finally convinced me that it's possible to build amazingly good software that lasts.
I'm trying to decide between 2x30" and 30" + 2x20"(in landscape) on either side.