"We're still getting [Wii] in, but it's just slow. We've tried getting more from other stores in our district, but we're just selling out too fast," a Best Buy employee told Joystiq. One GameStop manager claimed this supply issue happens every year after Christmas and estimated things will get better in mid-February. Other retailers echoed: supply is still coming in, but selling out fast. Online stores, like Amazon and NewEgg, aren't faring any better.
We've requested comment from Nintendo a couple times on this issue, but the House of Mario is staying mum. We've also requested official comment from all the major retailers, but have not received a response. If you know someone looking for a Wii, the best we can do is repeat the same advice we've been giving for years: just keep calling your local retailer and ask when it'll receive more stock.

