Not to put too fine a point on it: New Orleans is fucked.
If you haven't already, please make a donation to any relief organization now working in Louisiana or Mississippi. Yes, I know you would like to do something more personal to help, but as my friend Jeff says: "Giving of your time is useful, but nothing is more useful than money. The reason is that money moves at the speed of light to the disaster. There are no logisitical nightmares in trying to move money. All money works equally well (as opposed to some foods, which might be inappropriate in the community they reach), it doesn't need to be cleaned first (like clothes do), and it isn't the wrong kind (like building materials can be)."
If you don't have a favorite charity, the American Red Cross is always good. If your employer doesn't do matching gifts, send it through Kung Fu Monkey (look for the PayPal button) and John Rogers will personally match your donation at the end of the month.