Some opinion is suggesting that the only solution to the current disaster is the nuclear option. Even the relief wells may fail as noted in the detailed analysis in the link below.

http://www.theoildrum.com/node/6593/648967

http://video.godlikeproductions.com/video/Simmons_Says_Nuclear_Device_Only_Option_to_Stop_Oil_Flow

The reserves for the oil field have been estimated at 2-3 billion barrels. i.e. 8-12,000 Exon Valdez's worth.