If you look at Apple.com and compare it with  Apple.ca, there's one key thing missing in the features listed for the iPhone 4S:

Apple.ca

Apple.com

Sadly, no Siri for Canada. Yet.

It's coming, just looks like Apple has to "Canadian-ize" it first. So, adding in a few "eh's", some bacon, and the ability to understand all the requests for "Siri, why didn't the Leafs make the playoffs again this year?"