Harmonix and MTV have bolstered the Rock Band library of music on Xbox Live.
Added today are three tracks by The Killers: "Mr. Brightside", "Smile Like You Mean It" and "Spaceman". These cost 440 Microsoft Points (GBP 3.74 / EUR 5.28) as a pack, or 160 Microsoft Points (GBP 1.36 / EUR 1.92) individually.
There's also music from Yngwie Malmsteen's Rising Force, which we've never heard of. "Caprici di Diablo", "Damnation Game", and "Red Devil" are the tracks on offer, which, again, can be bought as a three-strong pack or individually.
Finally, there's "Laid to Rest" by Lamb of God, which is a brilliant name for a band. No we've never heard this song before, but you can for 160 Points.
Incidentally, there were also supposed to be Soundgarden tracks "Jesus Christ Pose" and "Pretty Nose" up today, but Major Nelson's blog claims these haven't shown up.
All Rock Band DLC will work in Rock Band 2 and vice versa, remember.