September 1st was declared Blog Relief Day and I am participating by encouraging you to throw some change at Habitat for Humanity. Once rescue efforts are complete the long term issue is going to be housing. Everyone I know on the Coast... that I've heard from yet... has had their home destroyed.
If you are interested in other charities please check out Instapundit's Round Up and The Truth Laid Bear's Relief Page. These are the guys who organized Blog Relief Day.
If you donate TTLB encourages you to document it at his contribution logging page so that bloggers can see what a difference they are making.
Also, don't forget that if you donate at a Lowe's they will match your gift before shipping it off to the Coast.