Because I love debunking urban myths. Yes, public libraries in New Orleans are accepting book donations post-Katrina. No, that's not really the best use of your time and money. Many donated books turn out to not be usable, mailing books may result in multiple duplications, and they're too short-staffed to be able to process the book donations anyway. Instead of spending five bucks on book rate, donate that five bucks directly to the libraries.
More Info: NOLA Library Donations FAQ