People have complained that the Internet is too accessible. Many web sites have popped up trying to help, but searching through them all is a pain.
Google is doing it's part as a search engine company by adding a special search at http://www.google.com/katrina.html that only searches public databases of Hurricane Katrina-related web sites.
The only other search engine to do so is Lycos, and they are unfortunately no longer a major player...
Also try these two website that attempt to automatically combine information from the dozens of refugee listing sites into a single search database: Katrina Safe and Katrina List. Now that's a good use of technology!
Google Katrina search
Lycos Katrina search