After I built my CNC I started getting requests from students (and even a prof) to make parts for their projects. There was apparently a lot of red tape around the school equipment. I had this idea to make a web-based CAM system with a quote function (ie. ponoko for CNC)
I dubbed this flash-based CAM program "PartKAM" (which stands for kick-ass machining)
it's still online at partkart.com
the sources are available on launchpad. It's about 20k lines of actionscript 3.