Wii is the only console up WoW, so I don't think Just Dance 2 did nothing. Right now, it's nothing significant, but Just Dance 2 should be a long seller and it's influence on hardware should be similar. Though I am disappointed with it's start.
BTW, has anyone seen Just Dance 2 UK ads on TV yet? Ads may have started on the 15th in the US (that's when it went up on the Youtube channel at least), but I've not seen signs of them in UK yet.
A game I'm developing with some friends:
www.xnagg.com/zombieasteroids/publish.htm
It is largely a technical exercise but feedback is appreciated.