there was a good article in the New York Times yesterday entitled:
Gulf Oil Spill, Bad But How Bad?
It gives good info, talks about what the plans are (at this point in time) for dealing with the gusher, and a historical perspective, comparing it to other spills (this really isn't a spill, but a 'gusher').
Communicating with a friend living in Louisiana, it is quite traumatic and tense for everyone there, especially the fishermen who have know idea of their future.
It's a popular part of the country to travel to, I hope efforts are successful and it remains so, for travelers, but most of all for those who call it home.