The London Observer has a great audio slide show on music in New Orleans, post-Katrina. (To check it out, click on the photo, which shows the remains of a jukebox after the flood.) You get the basic gist from this paragraph in an accompanying article.
Following the storm it would be hard to say that music is in rude health, even in its rawest form, but look hard enough and the spirit of what everyone here calls 'the real New Orleans' is still intact. 'I defy you to spend a day in this city without hearing live music,' says Ben Jaffe, whose parents founded the French Quarter jazz venue Preservation Hall in 1961. He now plays bass with the Preservation Hall Jazz Band. 'You can't walk down the street without hearing live music.' He's right. Even with 50 per cent of the population absent, much of the city a ghost town where even the 24-hour diners close at lunchtime because they've run out of food or staff and neighbourhoods are mouldering and decaying, music is everywhere, be it hip hop, bounce, brass bands or traditional jazz.