Here's a link a bunch of places:
http://www.redferret.net/pmwiki/pmwiki.php
I bookmarked it a while back, but I noticed some of the sites may no longer exist, but it will give a good start.
Also:
www.fluxblog.org
www.dmusic.com
- for fluxblog, don't forget to check all of the sites they link to, and branch out using those sites, etc.
Hope it helps !
cya,
will.