I just read this too, I believe they are referring to US, but why not check here also...
Info:
According to this post at Joystiq, most major electronics outlets may just have a nice stockpile of Wii’s available for Sunday and the following pics are somewhat proof that they may have some in stock. If you’re looking for a Wii, check out Circuit City, Target, or Best Buy on Sunday, January 21st and you just may score one! As always, get there early. Here’s what Joystiq says about the situation:
* Circuit City has Wiis. Limited quantities. No rainchecks. While supplies last. Limit 1 per household. Vouchers will be handed out Sunday, 1 hour prior to opening (10am).
* Best Buy has Wiis. Minimum 20 per store. No rainchecks. Stores open at 11am on Sunday.
* Target only has Wii remotes and nunchucks in the ad (who knows if they’ve been stockpiling consoles).