Right now, if you read the latest article on The Oil Drum, they may be concerned about the seals at the top of the actual well head. There has been an ROV at the well head for over a day now. Saw the video feed for one ROV down there for a few minutes. They are sampling the gas leaking. The leaks down there seem to be increasing. The seals down there could blow out during the Top Kill according to the Oil Drum article. These are the seals at the top of the diagram below.
