Directnic is a domain name registrar in New Orleans that has employees there trying to keep the servers up.
One of their employees is running a blog here. Pictures, and graphical moment-by-moment descriptions of the choas that has gripped the city are on the blog.
Moment by moment news here. GREAT list of blogs here.
Hans Eisenman mentions two good links: A collection of photos of Katrina devastation and the latest on Katrina charity scams. Be careful. See FEMAs offical list of donor sites.
Other links: The Katrina Help wiki and an incredible amount of stuff going on at Craigslist/New Orleans; as well as this one on before and after sat pics. Tech community helping.
More sat pics of Katrina.
Help: Quick and easy is the Red Cross, as low as a $5 donation. There’s also eBay GivingWorks, where you can buy products that direclty benefit charities. More recognized charities on this offical list of donor sites.