It's mind boggling to even begin to grasp the devastation left in Katrina's wake. But already there are so many ways to help. The few I know about in the crafty world are these:
-Wee Wonderfuls is offering the fabulous mini-me apron set for auction. 100% of the bid price will go the Red Cross
-Threadbared is sending 100% of the moneys earned from their t-shirts to the Red Cross
-Crafters United on Etsy is donating 100% of its sales to Red Cross.
I'm sure there are many more. And, of course, you can just go directly to the Red Cross website and donate. It's going to take a lot of moolah to meet the needs of Katrina's victims.