Remember, I am in Canada now

Two friends sent me an iTMS gift certificate for my birthday, which I always appreciate thanks to the amount of music I buy. But everyone needs to be aware that I am in Canada and thus use the Canadian iTMS. Which means American gift certificates don't work here. It isn't too big of a deal thanks to the fact that I still have an American credit card and thus can switch back and forth by changing all of my credit card info, but it is something to be aware of.