David Letterman gave an interview to Rolling Stone which is not yet online and which probably will only be excerpted, not available in full, on their site when it is up. In it, he expressed bafflement at Mr. Leno's exit over at NBC, suggested it would be great to have Jay guest on Late Show, and hinted that his days of doing that show may be coming to an end. I suspect the latter is overstated; that CBS will let Dave stay right where he is as long as he wants, and that gig won't end until he wants it to. That might change if some superstar potential replacement emerged but for now, I think that's just Letterman being Letterman. He talked like that his last years at NBC, too.