When there are no retail releases, I'm not going to bother posting these until the Thursday Virtual Console/WiiWare announcement. The Rock Band songs will always be the same as the Xbox 360 version.
Retail (Tuesday) - nothing
Rock Band 3 DLC (Tuesday; * has optional Pro Guitar/Bass for an extra $1) - Creedence Clearwater Revival – Have You Ever Seen the Rain? * - Creedence Clearwater Revival – Lodi - Creedence Clearwater Revival – Susie Q
WiiWare (Thursday) - Newton vs. The Horde (500 pts)
Big Surf Island adds another well designed section to the game, it's worth getting. The other stuff is not a big deal. I should still have my copy around somewhere if you find you need someone to get the online achievements.