Researchers have discovered a new microbe that is eating the gulf oil spill fairly readily, with the added bonus of not depleting the dissolved oxygen supply too much. (abstract only, article is paywalled)
Certainly a piece of good news out of that mess.
Here's an odd thought I had some years ago..what would happen if these sorts of bacteria got established deep down in the big pools of oil? As in, one day we find out we are a few months away from no oil because it is being eaten up....wouldn't that be interesting.