A lot in a few words?
-- from Katrina you learn that you need a good platform, a culture of trust, then get out of the way
-- twitter and blogging, good at getting the word out
-- need for good sites which bring together grassroots and other resources
-- government people are working with sites in a loose (so far) partnership with grassroots efforts; need more
... and another storm's on the way
Follow Craig Newmark on Twitter: www.twitter.com/craignewmark