For everyone affected by Hurricane Katrina (EVERYONE from S. Florida to New England, whether by storm, levee breakage, floods, tornadoes, etc.), my heart goes out to you. This is a terribly sad event. I am so glad that most of you were able to evacuate ahead of time, and I hope you remain safe wherever you are. For those who could not evacuate or those along the Gulf coast who were blindsided when the storm turned your way, I pray you were able to escape the devastation.
Here's a link to the American Red Cross's donation site for anyone who wants to donate. I urge you to do so if you have the means at all. There's a lot of people without homes and who need medical attention and food right now.
I've added more links to my sidebar: American Red Cross & Salvation Army for human relief and The Humane Society for animal relief (thank you Sue). I also added a link to FEMA, which contains multiple links and resources including how to further help or locate missing relatives.