John McCain appeared on Letterman on April 1 and had a pretty funny interchange at the opening of the show. Obviously, it was all scripted but McCain carried it off well.
McCain was then quite impressive in his interview later in the show. The Democrats really do need to focus on anything but the war, as McCain has it all over them in terms of credibility.
People in the US will probably be heartily sick of all of the '3AM' ads. It seems that they'll be an eternal part of election campaigns into the future.
The big question for me is whether these guys get any royalties at all.