I'd love Fashion Nugget or Comfort Eagle as full albums downloads but would love a nice 6-10 pack as well.
Short Skirt, Long Jacket
Sheep Go to Heaven
Stickshifts & Safety Belts
Love You Madly
Of course, any Cake song would be a blast to play. Make it happen Harmonix! I posted a comment about them being in Rock Band on their Facebook page, it wouldn't hurt if the fans here would 'like' it, or comment as well.