I don't know if it's been mentioned yet or not, but what about Bush joking about his whole reason for the war in Iraq, those pesky WMD? We all remember that one where he was showing pictures of himself looking around the oval office and saying 'nope no WMD there'. In case you don't here's the video
http://www.youtube.com/watch?v=6yJF13BS-hE
The president joking about not finding something he started a war over and troops are dying because of. Surely the people who are up in arms about Kerry joke were just as outraged when Bush was making these jokes. For some reason though, I doubt they were.