I have seen a LOT of Bush videos floating around. Here is a link to some of my favorites. Most of these are pretty damn funny. I don't think any of these have been posted here before.

Florida's new Diebold electronic voting machine

Short but good summary of the GOP convention

Jon Stewart catches Cheney in a bald-faced lie

Bush, the 10 year difference. What happened?

Why do I want Bush gone, Seriously - this one is a bit slow

Not funny, but great anyway:
Tim Ryan, talking about rumors of a draft, owns Bush on the floor of the senate