I have a couple of good links for people looking to donate $ for Katrina.
Charity Navigator.org rates charities on how financially healthy they are and how well they spend dollars that are donated. This page gives guidelines and links for donating for Hurricane Katrina:
http://www.charitynavigator.org/inde...8/cpid/310.htm
Note that it does not list the Salvation Army because it cannot analyze its financial health with hard numbers. (but we have all seen the wonderful work they do.)
Here is a page from the Philanthropy Network that also provides lots of links for donations:
http://www.fdncenter.org/pnd/hurricane/index.jhtml