It's events like the Katrina Hurricane that show what this bizarre new medium of blogs can really do. Terry Teachout has a pretty good list of hurricane related blogs if you're looking for info from the more personal side. Each blog also spins out to links for dozens of others with similar content from a different perspective. I look through them whenever I start feeling numb to all the news reports.
If you're looking for a way to help and don't live in the area, I suggest donating to the American Red Cross. Best of luck to everyone down there.