For me, only the ads that are funny are the ones I remember best, and I won't be forgetting this ad anytime soon. John McCain's campaign recently released a hilarious ad about Barack Obama and the messiah image partly created by himself and partly given to him by the media. Here's a link to the video via YouTube.
If you don't think the video is funny, then there must be something wrong with you. I would prescribe a very healthy dose of Laurel & Hardy, W.C. Fields, Abbott & Costello, Charlie Chaplin, The Three Stooges, Bob Hope, Jack Benny and Woody Allen. Not necessarily in that particular order, mind you.