Conan to visit 'Letterman'

Interesting booking for "Late Show with David Letterman": Some guy named Conan O'Brien. Happens May 17. Here's more from the release: 

O’Brien succeeded Letterman as host of “Late Night” in 1993 after Letterman left the show to begin his LATE SHOW on CBS. O’Brien hosted “Late Night” until 2009, when he became host of “The Tonight Show” until January 2010. In November 2010, he began another chapter in his career with the debut of his late night cable talk show, “Conan,” which he currently hosts. This will mark O’Brien’s fifth visit to the LATE SHOW. He last sat down for an interview with Letterman 13 years ago, on Jan. 13, 1999.