In an official change to the contest details, it looks like I won't be ordering the prizes from Gamestop.com after all. In addition to offering only Wii console and software bundles at this time, the site is requiring that the billing and shipping addresses match. I'm not sure whether this was something that was implemented since I checked the site in December or an oversight on my part, but either way I apologize. I'll just have to take my business elsewhere. The site I do end up using will depend on cost and availability and such; you're welcome to comment on this entry with any suggestions. I'll be sure to pick a reputable company, though, so some shady dude at an unheard of cyber pawn shop doesn't end up with our personal info, lol!
Many thanks go to the individual who kindly brought this matter to my attention!