We have international shipping too for this promo. Click the "International" button in the shopping card on the Shipping line. A Country field should pop up.

It mentions international shipping on the billing page - is it still USA only?

Can't see anywhere for the country to go:

Name, Address, Apt/Suite, City, State/Province/Region, Zip

EDIT: I solved the puzzle ok, but the form which comes up only has the fields above

EDIT2: thanks - I think the problem is the website not loading properly due to congestion so certain page elements weren't visible.

If you click the "International" option under Shipping a Country field appears.

Try the link in the comments from Geekbri.