There are various wiki-type projects relating to Canadian history, but I had not seen this thoughtful analysis of Wikipedia's APOV (American point of view) until today. Participant Historian, sadly, seems no longer to be, well, participating, but this post won a Cliopatria Award for best single post for 2006.
The argument is that there are Wikipedia in English, French, Russian, German, Basque, even Klingon, but within the English-language one, American interests and perspectives generally dominate, or at best, non-American perspectives have to accept being labelled as such. Not that the problem is uniquely Canadian. As PH says, the Basques get a Wikipedia, but the Mexicans don't.