If you were wondering how to get your nightly builds neatly automated, here is the solution.
Nice article for Cruise Control :).

Cruise control makes it possible to build continuos integration systems which can watch out for changes to files in VSS/CMSYnergy/ repositories and then initiates the build. Also contains features to invoke tools like NUnit, Nant etc.

http://www.cornetdesign.com/2005/08/cruisecontrolnet-nant-and-boy-do-i.html