Serious response: Its all just a publicity thing. Letterman needs news because everyone is focused on Conan. Tonight Show has always been the top dog over Late Show ever since Hugh Grant went on and talked about his little 'incident'...as for Palin, in order for a run in 2012 she has to keep her face present in whatever form. There was a GOP dinner a couple days back where she was swaped for Newt as the keynote speaker because she couldnt make it. She ended up making it, they stuck with Newt, but she sat through the dinner anyhow.

Original thought: Id take a slutty FA Palin over a slutty FA Biden.