the reason given by the CEO is that nintendo has already reached target for their fiscal year. it is reasonable. it's not like they're witholding like 50% of the stock, perhaps 5-10%. it is not implied anywhere that nintendo did it to create artificial demand. if that is the case, nintendo's 2007 april-june sales (fiscal 1Q of 2007) would beat most analysts' expectations and it would be a good short term play on its stock, perhaps especially after fiscal 2006 earnings are released in... i dunno, 1 month or so. either if nintendo isn't holding back, it could be an indicator that production is ramping up in earnest, and a similar stock play argument would hold as well.
the Wii is an epidemic.