How much are they losing per unit sold? Around launch I heard it was around $20 put im not sure how accurate that was or how much its gone down since then.
I see them either doin a $50 cut around Aug/Sept when Pikmin, Wind Waker, Wii Fit come out or hoping those games help sales enough and rely on holiday bundles/deals. If they dont do a price drop then, I assume I they will wait til the fiscal year ends so around April/May and depending on how much profit its making at that time doing a $50-100 cut.
When the herd loses its way, the shepard must kill the bull that leads them astray.