It's in the works:

http://www.invadecanada.us/
http://www.washingtonpost.com/wp-dyn/content/article/2005/12/29/AR2005122901412_pf.html

LOL (Yikes, the 2nd one actually concerns me)

Oh, and in this one supposedly Britain always planned to get its colonies (well specifically US) back too:

http://www.straightdope.com/mailbag/mcanadawar.html





>>>>>>No Tom, the mistake the US made was not stopping until you owned the entire continent :)
>>>>>
>>>>>Not that simple. They did once try to take Canada, but it didn't quite work out the way they wanted. ;)
>>>>>
>>>>
>>>>We did? Am I getting senile?
>>>
>>>Don't you remember? Back in 1812? You guys invaded us. Now, don't get me wrong, I'm not saying it was you personally... ;)
>>
>>
>>But Canada was a British colony and part of Great Britain. Canada would not become an independent country for what, another 50 years? It was the Brits we went to war with and Canada got caught up in the middle of it. You can't call that trying to "take Canada."
>
>I can if others do. So there!
>
>From the 2nd paragraph of the Wiki text:
>
>The war started badly for the Americans as their attempts to invade Canada were repeatedly repulsed by General Isaac Brock commanding a small British force, composed largely of local militias and Native American allies.
>
>Also, look up General Hull from the same war.
>
>There are lots of other references too. Technically, I guess it was more 'Upper' and 'Lower' Canada, but still... It's not just me.