Get your source code here: PyCS CVS
If you're planning on running a server rather than developing, you only need the latest source archive (see version history) from the test server instead. Developers should download this too - the CVS source doesn't have everything in it (config files etc are missing).
Discuss Python Community Server on the CommunityServerWiki!
If you are interested in helping out with development, please join the mailing list and mail Phil to tell us about yourself and what you'd like to help out with.