For those who missed this in Macworld.
Teleport is a simple utility to let you use one single mouse and keyboard to control several of your Macs.
Simply reach the edge of your screen, and your mouse teleports to your other Mac! The pasteboard can even be synchronized between the computers.
http://abyssoft.com/software/
This thing rocks, I use it at work and it still fascinates me everytime.
scottie