Is the BP Gusher Unstoppable?

Posts on the industry insider blogs like the Oil Drum have been discussing whether the well casing is now damaged beyond recovery by the failed "Top Kill" and BP's only option is to siphon off as much oil as is practical while they wait for the completion of the relief wells. This scenario fits with what we have been seeing lately. BP did announce that it was no longer working to cap the well, only to contain the oil. The fear now is that well casing will be eroded by the escaping oil and detritus and further weakened, allowing for the collapse of the wellhead.

Julia Whitty at Mother Jones discusses this possibility:
Is the BP Gusher Unstoppable?

"It means they will never cap the gusher after the wellhead. They cannot...the more they try and restrict the oil gushing out the bop?...the more it will transfer to the leaks below. Just like a leaky garden hose with a nozzle on it. When you open up the nozzle?...it doesn't leak so bad, you close the nozzle?...it leaks real bad, same dynamics. It is why they sawed the riser off...or tried to anyway...but they clipped it off, to relieve pressure on the leaks "down hole". I'm sure there was a bit of panic time after they crimp/pinched off the large riser pipe and the Diamond wire saw got stuck and failed...because that crimp diverted pressure and flow to the rupture down below.