For some reason, iTunes customers in Canada can’t use gift cards to purchase apps from the app store.  Seems that this might be in violation of Canadian law as such terms must be disclosed on the packaging so that consumers know the full story before purchase.  This little tidbit of information is only available on the iTunes website.

Update 5/26/10:  Faced with the option, by Canadian law, of either allowing iTunes gift cards to purchase anything, or update their gift card packaging to indicate the gift card’s limitations, Apple has chosen to allow iTunes gift cards to purchase apps from the app store.  Perhaps this is only a temporary remedy until they can update their gift card packaging for Canada, or perhaps the change is permanent.  Still no explanation why these gift cards couldn’t purchase apps in the first place.