I missed this last week when it came out, but here's a video detailing the simmering feud between Conan O'Brien and the tag team of Jon Stewart and Stephen Colbert:
Some fun facts, off the top of my head:
Robert Smigel, the former Late Night with Conan O'Brien headwriter and the man behind Triumph the Insult Comic Dog, was also behind the Ambiguously Gay Duo (from The Dana Carvey Show and, later and more popularly, Saturday Night Live). The voices for Ace and Gary were provided by Steve Carell and Stephen Colbert, who moonlighted as reporters on The Daily Show with Jon Stewart.
Triumph the Insult Comic Dog has also made an appearance on Jon Stewart's show.
Colbert and Conan taped a bit last year that parodied Fox News blowhard Bill O'Reilly's appearance on The Late Show with David Letterman, where the argument between the two men got animated. Colbert and Conan's segment got heated as well, and Conan ended up shooting Colbert. In the heart.
Greg Daniels, the man behind the US adaptation of Carell's hit show, The Office, was Conan's college roommate at Harvard and a colleague at the Harvard Lampoon. He also worked with Conan on SNL and The Simpsons. Apart from Carell, the show also stars another Daily Show alum, Ed Helms. (John Krasinski, who plays Office heartthrob Jim Halpert, was an intern on Late Night.)
Conan O'Brien started out as a writer for Saturday Night Live, working with comedians such as Adam Sandler and Jim Breuer. Before blowing up on his late night gig, Jon Stewart starred in Sandler's Big Daddy and Breuer's Half-Baked.
Emerging comedian Dmitri Martin, who gained popularity as the Gen-X correspondent on The Daily Show and is now working on his own show, first made a name while he was a staff writer for Conan O'Brien.