Yes, we can already make Katrina jokes as well. I just won't post them because I'll be banned immediately for racism.
Let me try... Q: What do you get when you cross two planes and a World Trade Center? A: 9/11! Am I doing it right?
The phelps one got me right off the bat, did he really act like that? This one gets me every time http://www.youtube.com/watch?v=GHUHAEtKH5c