|| The only other country that I can think of which uses another country's
|| currency as its official currency is Kirabati, which relies on the
|| Australian dollar. Does anyone know of other cases in the
|| post-WWII era?
> Sure, Kosovo. It's switching from the Mark to the Euro now.
Quite a few of the Pacific Islands use the USD, AUD or NZD. Check out the notes at the bottom of http://www.1728.com/Currency.htm for a comprehensive list. Note that some of these are still colonies/territories and the list is obviously pre-Euro.