Have we reached the bottom of the list yet?

I’m referring to the list of possible solutions for the devastating Gulf of Mexico oil spill that’s endangering countless species of animals in the water and outside and is wreaking the environment along the fragile coast.
The question is, Should we nuke the well in order to close it?
The Russians have used this method successfully several times in the past and more and more scientists and experts seem to start warming up to the idea too:

As the latest effort to plug the oil leak in the Gulf of Mexico meets with failure, the idea of nuking the immediate area to seal the oil underground is gaining steam among some energy experts and researchers.
One prominent energy expert known for predicting the oil price spike of 2008 says sending a small nuclear bomb down the leaking well is "probably the only thing we can do" to stop the leak.
Matt Simmons, founder of energy investment bank Simmons & Company, also says that there is evidence of a second oil leak about five to seven miles from the initial leak that BP has focused on fixing. That second leak, he says, is so large that the initial one is "minor" in comparison.
"Probably the only thing we can do is create a weapons system and send it down 18,000 feet and detonate it, hopefully encasing the oil," he said.
His idea echoes that of a Russian newspaper that earlier this month suggested the US detonate a small nuclear bomb to seal the oil beneath the sea. Komsomoloskaya Pravda argued in an editorial that Russia had successfully used nuclear weapons to seal oil spills on five occasions in the past.
Asked by a Bloomberg reporter about the risks involved in setting off a nuclear bomb off the coast of Louisiana, Simmons argued that a nuclear explosion deep inside a well bore would have little effect on surrounding areas.
"If you're 18,000 feet under the sea bed, it basically wont do anything [on the surface]," he said.

My answer would be yes, let’s nuke the damn thing and close it shut once and for all.  Especially since there wouldn’t be any real risk of radiation leaking out from such a depth, I don’t see why that solution has not already been put into play.
I can only guess that BP doesn’t want to risk making the well unusable by detonating a nuclear device right next to it, but if the solution could work I believe that Obama should order it.
And what’s that tidbit about a second leak a few miles off that the we never heard of before?  Is that true?  Is it really much bigger than the one BP is trying to plug?  If the answers are yes and yes, then is anything being done to plug that one too?  What’s going on here?  Obama?  Hello?