This is great! I've been using the Synergy Project to share a keyboard and mouse between my two Macs at home for a few months. It wasn't overly difficult to install and the instructions were well-enough written, but I can definitely see where the command-line might scare off people who might otherwise use the software. A pair of developers have been working on a GUI wrapper for the Synergy Project and its installer. They're calling it SynergyKM.
An alternative to Synergy Project which I've also tried is Teleport from Abyssoft.
Note: I've referred to the open source KM software in this post as "The Synergy Project" to avoid confusion with the excellent iTunes-controller software Wincent Colaiuta called Synergy.