After registering with TunesTracker, users can enter the names of up to 50 of their favorite music groups. Once a day, TunesTracker checks the iTunes Music Store for new songs by those artists. When there is something new, TunesTracker sends an e-mail alert listing the vital information about the new tunes, including the song title, album name, and composer. By clicking a link, users can open the song in the iTunes Music Store, listen to a clip, and buy the song.”
TunesTracker email service alerts you to iTunes music
“TunesTracker.com makes the iTunes Music Store even better by keeping music fans up-to-date about their favorite artists. The service is free.