Rebuilding houses in New Orleans was just great ! We had different kind of works like painting (inside or outside the houses), gardening (to sell some food to the neighbourhood) or rebuilding houses. One of our most impressive work was on the roof of one of the most damaged house. The owner was there and it was really moving.
I only had some remarks to do about the safety. If you choose to come, you should not be afraid of using machines, tools or... walking on a roof !!
New Orleans is a great city to have fun. You can enjoy the jazz clubs every evening... I really had a great time there and advise everyone to try it !!