I am making a complete list on my web site, here.
Cool people (who sing their anthem) include:
Amy Williams of England, who sang a rousing edition of God Save The Queen, Frenchman Jason Lamy-Chappuis, and most of the Canadians--who could help but sing with the great audiences in Vancouver!
Idiots (who don't sing) include:
Basically all the Americans (except for Seth Wescott). But you gotta hand it to Shaun White, who gave a rousing air-guitar solo at the end of The Star Spangled Banner.
In case you forgot the Star Spangled Banner, you can get the words here. And you folks who put the words on the screen for all the idiots to read, the last punctuation of the first verse is a question mark.