Garageband.com Musicians upload their music here to be reviewed by other members.
The Musician's Atlas - Annual directory of contacts in the music industry and host the annual Indie Music Awards
Indie-music.com Tips for bands, lists of venues for touring, radio stations, record labels, etc. Sign up for their newsletter
Taxi.com For an annual fee, Taxi will give you leads on what the major labels are looking to sign. Sign up for their free newsletter.
Buzzfactor Bob Baker's music marketing tipsheet and newsletter
Music Strategies Marketing strategies and opportunities for musicians, they also run the annual Music Strategies Conference and Expo
Tim Sweeney & Assoc - They provide artists the opportunity to use their established relationships with radio stations, record stores, distributors, press and special live venues