Appearing on the Late Show with David Letterman is a big deal for most comics. For Brian Kiley, who appears on the show tonight, it's a little strange. Kiley is a writer for Conan O'Brien (both for Late Night and the new Tonight Show), and starting June 1, his boss will be Letterman's direct competitor. Kiley has done the Letterman three times before, he notes as an emergency replacement for another act that dropped out. And while he says he would never have gone on the Late Late Show with Craig Ferguson, since that show is in the same time slot as Late Night, O'Brien and Letterman have always had a cordial relationship, and no one ever said anything before. That might change now.
"I kind of viewed it as, well, maybe this is my last time on Dave because the Conan people might not be into it," says Kiley. "So I don't know."














