Links of interest to Minnesota Audiophiles - a work in progress.
Free (legal) downloads
Oliver Masciarotte has been posting a lot of links to free downloads on his twitter feed: @omasciarotte
Other Audio Clubs - Stereophile has a nice list, although some links are broken
diyaudio - very large community
parts express techtalk - lots of speaker building threads
Certifiable nuts at the audio asylum ;)
Find Nirvana at audiokarma