Thursday, Sept 1 is the concerted day of blogging for Hurricane Katrina relief. Details here at TTLB.
Donate today. I recommend Catholic Charities USA. Very easy online donation, immediate tax receipt, and CCUSA has a strong presence in the New Orleans area.
Blogger WizBang issued a call to action for bloggers. If you know something about disaster relief---anything---and that knowledge can help other people, get blogging and comboxing about it. He's got a good list to start you thinking about how you might help.
Technorati flood aid tag.
Click here and scroll down for a list of bloggers posting from/near/about the affected region.
Craig's List - New Orleans is filling up with offers --- from people from around the nation--- of free housing for Katrina refugees. Got a place? List it there. The quickest way to ease this suffering is for people to open up their homes to the suddenly-homeless.