When Conan O' Brien takes over the Tonight Show in June, his new announcer will be... Andy Richter.
Richter was Conan's sidekick for the first seven years of Late Night. He made a generally positive addition to the show, since he gave Conan someone to play against (it helped reign Conan's manic behavior).
I looked for a funny clip of Andy Richter - who is generally a funny guy - but couldn't find one that was funny enough.