I'm Héctor from Spain, and I would like to join the Tool Army.. but I cant, I try to pay with my credit card (and some of my friend's card) and diferent IPs and computer, nothing to do, when I think I've finished I always come back to the Step 3 (payment)
it's worth it because you're essentially paying your favorite band/artist for the chance to pay 'em even more a full 48 hours before lotus. you also get exclusive TA access to a wide variety of BMB news/updates that are often laced in valuable tool-related information (e.g. links to various e-shops & pricing structures). it's awesome!
From memory the TA store has issues processing credit cards from different countries (I know it couldn't handle Canadian ones and I'm not sure if that's been corrected). If this issue still persists, then there's no easy way around it as far as I know.
TA is a waste of time these days though - the website is broken, and TA exclusives are so rare you'd have to have more money than sense to take part in it as it stands.