Louis CK was the bright-eyed rookie when he joined the first writing staff of "Late Night with Conan O'Brien." That was a tough feat to pull off on a show hosted by an inexperienced 30-year old on-camera rookie and led in the writing room by a 33-year old scribe, but at least Conan O'Brien and Robert Smigel had experience with "Saturday Night Live" and other TV shows.