Hurricane Gustav has already swept through Haiti, the Dominican Republic and Jamaica. After Cuba, its projected path will take it over the Gulf of Mexico, before arriving on US shores. New Orleans has already begun a mandatory evacuation for coastal districts and parishes.
You can follow preparations for Gustav on the the Red Cross’ Twitter feed.
A wikipedia page for Gustav (2008) was created today and is being regularly updated.
The Eye on the storm blog is also offering a running commentay.
Update 1: The Gustav Information Center has been created for coordinating volunteer knowledge-sharing related to Hurricane Gustav.
Update 2: Predicted route of Gustav has been updated.
Update 3: New predicted route.