Data
2007-08-14: The new online database system is now live:
http://db.publicdomainworks.net/
The old prototype version based on moinmoin can be found at http://alpha.publicdomainworks.net/.
Some of our other data is stored as flat files in the repository (which also includes various helper scripts to help parse and manage that data). For example there is a list of public domain composers:
http://p.knowledgeforge.net/pdw/svn/trunk/data/composers.txt