Thanks! That's what CS eventually suggested, too. I was required to create a PayPal account at the end of the process, but at least it worked. Crazy that they do not have a straightforward credit card processor.

Other than that, once you get the kinks worked out (like installing the APN just before you switch out your iPhone SIM, and being patient for it to find a network after you arrive), this is still a great intl SIM.