Audiogalaxy - Music reviews and downloads.
betterPropaganda - New music reviews.
Epitonic - Free mp3s and record reviews from a wide variety of genres.
Insound - Online music store with lots of indi downloads.
Kill Rock Stars - Northwest record label with some great mp3s.
Tiny Telephone - John Vanderslice's California studio has mp3's from Spoon, The Mountain Goats, Death Cab for Cutie and more.