I am a little late on this.
There are several bloggers better than me out there w/ lots of information on how you can help people in need due to Hurricane Gustav on the heels of the Katrina Anniversary, and some information on the people living in the thick of it right now.
From them I have gathered that the best way to help right now is through INCITE. Please know that any donation you can give right now could mean the world to someone in danger right now, even if it is five dollars. There are numerous people who are powerless to help themselves right now, b/c financially speaking they are not able to evacuate.
Our thoughts and blessings go out to those affected by Hurricane Gustav, and especially to those still suffering from Hurricane Katrina.