Hurricane Katrina has caused so much damage. Frightening. My thoughts go out to the people affected by the disaster.
If you can please donate to the relevant relief funds (and check whether your company can help out - ours matches employee donations).
The Google Earth community has extended Google Earth so that you can visualize what's going on - it helps put things in perspective. Seeing what Katrina has wrought.
Dave Winer is, as always, covering the issue well and posting useful links as is Scoble.
All the best to those folk living in Katrina's wake.