Originally saw this on RockBandAide but there will be a sale on all pre-Rock Band 3 dlc for all three consoles (PS3, 360, Wii) where all songs, whether they be single songs, packs or albums, will be 50% off, so it's the perfect time to up the amount of songs you have on any Rock Band title you have. And here's a massive PDF that Harmonix has released. http://www.rockband.com/content-assets/2012/09/RBDLCsaleGraphic.pdf
Just thought I'd let you all know. Anything interesting you might be picking up?