I think once the levies are repaied and the pumping system is working again, I think rebuilding New Orleans will not be too bad. The big things will be retoring order and getting the people out of there. There have been some really inspiring stories about people helping others, but sadly they have been drowned out by the acts of a few hooligans creating the lawlessness and terrorizing others.
I think the best solution to deal with the looters and gangs is a bullet to the brain. They want to act like rabid animals--treat them like rabid animals.
I know it sounds pretty harsh, but these animals are a waste of perfectly good oxygen.