www.digipen.edu/studentprojects/tag/
It's fricking awesome and they've been poached by Valve to work the mechanic into Portal 2, which is looking to be the best game ever made EVAR.
Really need to get myself working on something again. Bored shitless with Squishy so thinking about starting a new project.
I find it's nice to have a second "slow burn" project in the background that's a little broader in scope that I can ping-pong back to when I can't bring myself to work on the other one. I tend to try and have them be pretty different (e.g. an arcade action game vs an rpg kind of thing).