Here's that chart:
Notice the point of the price cut, around week 40. It has a boost and quickly falls into a trough. On NSMB release we see a huge rise, and aside from the last week of November Wii is very strong since then.
A game I'm developing with some friends:
www.xnagg.com/zombieasteroids/publish.htm
It is largely a technical exercise but feedback is appreciated.