unsure. I think Canon will service a global warranty under a year, but in proving purchase origin, it might get sticky. I'd just lie and say you're internationally on location, and need the camera shipped there and back within the "two weeks you are there" (!) that would probably keep them happy. As long as you can prove you bought it, it shouldn't be an issue.
As for extended warranties, I think international purchase means you don't get the chance.