Ok, so this page has links to the types of music I listen to. I don't pretend to defend my tastes. If you share them, great ;)
If you are interested in the state of the industry and legality issues regarding music downloads, take a look at Music Rants.
MP3.com: still one of the better sites (forgot who bought them out though.)
IUMA: Internet (Underground?) Music Archive
Yahoo! Music: Internet Radio, Music Videos, Artists, Music News ...
Music Biz Academy: Looks like might be good site for startup music groups.
Giant Path: An internet music guide
AudioInterference: Liz Copeland's site.