In late 2005, Greg and I recruited and led a 26-person team to create KatrinaShelter.com, a web product that allowed people to volunteer housing for Katrina victims. The project collected, organized, and mapped 1300 shelter offers from individuals sharing their homes and existing shelter organizations.
We presented our experience to the Red Cross and FEMA at their National Conference in June 2006. "Open Source Disaster Management"
I'm not hosting PHP anymore, so the main page no longer works, but the code is there, Greg, any time you want to reboot the thing :)