A vaguely-related, slightly-off thread question: when I am foolish enough to buy anything over the Internet from a US company, the Web sites often insist I enter a valid zip code, even when their web site allows overseas countries. Admittedly, its just bad web programming on their part, but is there a valid 'no such zip' code? (By the by,I tend to put NA when they insist on a state - that's Not Applicable, isn't it? Whatever, it seems to work)