Buildix is a LiveCD Linux distribution that has CruiseControl, Subversion, Trac, Ant and a few other bits and pieces all configured and working, along with a sample project for people to start playing with straight away.
There are also some scripts and tools the Buildix team has written to help managing it easier too. The image can also be installed onto the hard drive, or use the Virtual Appliance if you want to start off a project for real.
Many thanks to the Buildix team, my team is using it since January and with it we were able to start working on business features from day 1!