Metafilter links to this site detailing the religious faith of all your favorite comic book heroes (with neat-o collages).

Of note: almost no heroes are atheist, but many villains are. 1 mention of a Mormon character, despite that it is the fastest growing faith in America. And unsurprisingly, no comic book writer has yet had the guts to label either a hero or villian as a scientologist (although one transparent analog exists).