All National Anthems

"The medal ceremonies are some of my favorite parts of the Olympics. You get to hear the national anthem of the gold medal winner, and if you don't look at the screen, it's fun to try to guess what country the winner is from. Now you can study up on national anthems from around the globe with All National Anthems, a Yahoo! Maps mashup that allows you to find your favorite country and play the national anthem by clicking on the nation's capital."

http://www.appscout.com/2008/04/allnationalanthemscom_national.php

http://www.allnationalanthems.com/

(Additionally: http://www.youtube.com/watch?v=S0dIM6m5vws)