I haven't said much about Katrina or posted charities and the like, mostly because others have done such a great job with that. I've said some prayers and quietly donated, like most people are doing.
My only observation to add is that despite all the reports of poor planning and looting, I think America has done fairly well with this. In most countries, there would be massively greater problems of logistics just in terms of getting people enough food and water to keep them alive, and a lot more opportunistic crime.
The next few days, I think, will prove this out.