Katrina IS a big deal today and will be for weeks to come, not just because New Orleans is below sea level and not just because she could cause massive loss of life and property, but because Katrina could also disrupt Gulf supplies of petroleum (the GOM supplies around 1.3mbpd, we use around 20mbpd in the US) from rigs, refineries, and pipelines, etc., for a while.
Great Site, via John Robb.