Regis Philbin bids farewell to Live! tomorrow, but he still had time to stop by tonight's Late Show. Philbin stuck around for much of the hour, during which he and David Letterman talked about making out with each other, the possibility of Jerry Seinfeld coming between them, and more. Then, Philbin crashed the Vespa that Letterman bought for him as a retirement present. Here's our video of highlights.