If I were BP, I would post online detailed specs of the physics and equipment in play, in tandem with a massive cash prize for an original idea leading to the successful plugging of the leak.
I would also ask others like the government to come in and try things. It appears at the moment it's like try something, oh didn't work, wait a week setting up for the next idea, try that, oh didn't work. Lots of wasted time it seems from an outside observer.