Here are three links that are suggesting this might very well be an uncontrollable spew, an extremely alarming development, if true with a difficult to manage future, to say the least. I heard someone from an ocean-loving non-profit on The Dylan Ratigan Show say that if it's now just a hole with no casing spewing from the sea floor, the only solution would be a low-level nuclear detonation to turn the cracked areas of the sea floor to glass.
Here are the relevant links -
Is the BP Gusher Unstoppable? Mother Jones_