Call in the Top Brains from around the world and come up with some "Viable Solutions. BP obviously does not have the brain power for the job! This is an industry problem and there should no proprietary fixes that are being protected or don't want future lawsuits for failure.
Why wouldn't you drill down 1000 - 1500 ft close to the existing leaking pipe and set off an adequate underwater explosive charge in the new pipe that would severe the leaking pipe, 1,000 to 1,500 under ground. I sure there are better solutions, but I have not heard any viable solutions to date.