Hey guys, you can buy a nook and use in Canada or internationally. All you have to do is use a fake USA billing address and home address when you setup your e-reader. All you have to do is use your real email address and real CC. Barnes and Noble never ships anything to your home address and all confirmations of purchases and everthing else is sent via EMAIL.
If you liveoutside the USA you can either buy it off of ebay or there are numerous shops out there that sell e-readers like "STR" I know
http://www.shopereaders.com does.