"911 Blogs is the result of me wanting to assist the victims of Hurrican Katrina in a geeky sort of way in addition to the traditional ways we have already contributed. It is a way that anyone effected in anyway by any sort of emergency situation can obtain a free hosted WordPress blog."
Disclaimer: I am not affiliated with 911 Blogs. I only thought that it would be worth announcing here.
Original announcement: http://www.jasonbainbridge.com/2005/09/08/introducing-911-blogs/
More information on Hurricane Katrina relief efforts: http://wordpress.org/support/topic/43629