Xbox 360 and PS3 owners have been enjoying the new songs, improved instruments, and added features of Rock Band 2 for over two months now. To this point, Wii and PS2 rockers have been left out. We have a bit of good news for half that group, namely the Wii owners. The Wii version of Rock Band 2 will be shipping on December 18th, which means if you're lucky, you can be playing it on Christmas Day. The Rock Band Forums have the official news, coming from Harmonix themselves.