For the first time in 13 years, Conan O’Brien visits this program as Letterman’s guest. (Their previous Late Show get-together is shown at left.) O’Brien is in New York for the TBS upfronts, and now hosts Conan for that network. But since his previous Late Show appearance in 1999, O’Brien became the host of The Tonight Show on NBC – a job Letterman coveted, but never got, and lost to Jay Leno. Then, within a year, O’Brien lost the Tonight job, too – to Leno. Wonder what these two will find to talk about tonight?