Several rock acts are making the rounds this week on talk television. The D4 appears on the Late Show with David Letterman on Tuesday, while Seether appears on Letterman on Wednesday. On Thursday, look for Sum 41 on Late Night with Conan O’Brien while The Music appears on Last Call with Carson Daly. On Friday, Everclear appears on Late Night. And all week on Jimmy Kimmel Live, Slash will be guest co-host.