Alas, like the odd-shaped Somalian "coins" depicted in the other thread linked to by jbuck, this Nauru map-coin is not officially legal tender.
If I were Finnish, I'd be unimpressed with this "coin". They tried so hard to include Greece, by slapping on the non-euro-using countries of Albania and former Yugoslavia, but they didn't go to the same efforts to include Finland.
Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis