Last December I've just created a Google gadget for people who are looking to buy for Wii in Canada. And it is still a challenge to buy one. Since then, I'm improving it based on feedback I've got at one popular Canadian forum.
It checks Wii stock status at Amazon, BestBuy, Costco, Dell, dvdoffice.com, ecost.com, Futureshop, HBC, HMV, Sears, The Source by CC, Toys'R Us, EBgames.

If you want to add other stores, request new features or report please publish your comment in this blog.

If you don't have igoogle account, then you can watch Wii availability at
http://wiiincanada.googlepages.com/
and coming soon at wiisniper.com

Here is URL for the gadget:
http://gmodules.com/ig/gadgets/file/102280287500034393325/wii-search.xml

Experimental RSS feed is available now from http://www.myjavaserver.com/%7Evlasov01/wii-rss.jsp?rss

If you are looking for Wii Guitaro Hero III - Legends of Rock in Canada then you may want to use my another gadget.

It checks WII GHIII stock status at Amazon, BestBuy, Futureshop, The Source by CC, Toys'R Us.

Here is URL for the gadget:
http://hosting.gmodules.com/ig/gadgets/file/102280287500034393325/wiigh3.xml