I spent my weekend lending technical expertise, performing volunteer greeting in cyberspace, and just general organizing for the Katrina Peoplefinder Project. From the wiki page:
Several dozen sites have been established to help survivors of Hurricane Katrina find their loved ones, and to allow people to report missing people. This creates a difficulty for people trying to locate missing persons - they need to search dozens of separate databases and message forums.
So we've decided to create a centralized database, where you can search the data from all of these at one time.
