Today seems to be a good day in the mp3 blog universe
Muzzle of Bees has couple of My Morning Jackets Z B-sides.
Aquarium drunkard has Sonic Youths KCRW's Morning Becomes Eclectic performance from October 2004.
Indie Surfer Blog has a link to a live Lucero show which includes a Jawbreaker cover of Kiss the Bottle
MOKB has an unreleased Neutral Milk Hotel demo worth checking out