I came across these pics of some of Banksy's work he recently (Late August) did in New Orleans. He wanted to raise some awareness three years after Katrina and see what was going on there. Apparently in a cab ride through town he said to the driver, "There's still so much devastation - I can't believe they haven't cleaned this mess up." The cab driver replied, "This part of the city wasn't affected by the hurricane - it's always looked like this."
New Orleans is also an interesting place for him to show off because there is a rivalry between taggers/graffiti artists and "The Grey Ghost". The Grey Ghost is a local guy who goes around and paints over all graffiti he sees with either grey or beige paint. While I appreciate his effort to clean up the streets, I also find it a shame that a lot of great art. Grey is so booring, but I guess that's part of the point.
I'd like to imagine the Grey Ghost will at least pause for a moment before he paints over what Banksy did and appreciate it. Hopefully he'll find it interesting enough to leave up... Most of the stuff he paints over is probably not worth remembering, but apparently, he takes a picture before he blots out whatever it is with grey.
Check out the Banksy site for bigger (and more) pics: http://banksy.co.uk/outdoors/horizontal_1.htm