Banksy Does New Orleans

Banksy, the British street artist whose works pop up at random and all over the place, has done a series in New Orleans to commemorate the aftermath of Katrina. Banky's works usually comment on politics, culture and current events. Some picture Fred Radtke, the "Grey Ghost" - the New Orleans anti-graffiti crusader known for his practice of covering over graffiti with gray paint. See more of the New Orleans work here or search Banksy on Flickr for more outstanding works. (Thanks to Jockohomo for this info!)
The artist has posted pics of his works, including commentary here.