My two cents (sure to be lost in the shuffle anyway though):
At first the "big news" landed with a dull thud to me. Not really that "big" afterall. But I have reread Barbara's post several times and then I went to the WTS site and read the blood brochure.
Something that one of the "in-the-know" guys said the other day stuck with me. They mentioned that through their arrogance, the WTS has gone out on an limb making statements that will come back to haunt them.
After reading the "big news" and reading the section in the brochure about how safe blood transfusions are or aren't and all the references the WTS makes to secular experts, I see the potential for some major misrepresentation. If the WTS had just stuck to their Biblical guns and said, "The Bible says to abstain from blood and we follow that" and stayed away from trying to convince people that blood transfusions are more dangerous or riskier than they are they would have been able to defend it through religious freedom. But since they devote an entire section of the brochure to the risks and dangers of transfusions and if they did misrepresent the evidence, that's what is going to bite them in the ass.
They went from religious opinion to medical opinion in that brochure. They allegedly have twisted and misrepresnted information from secular sources to try to decieve their readers into not trusting blood transfusions.
I see the potential, but it ain't gonna be easy. Someone is going to have to actually file a lawsuit against them to see where it goes. The first one may not get far, but someone else will have to try again and again and again.
It could be like the tobacco lawsuits. At first they fail, then finally after several tries, one succeeds, then the floodgates open and the tobacco companies are hit hard.
But, like the tobacco companies, the WTS can survive. They may get hurt, hurt bad. They may have to make drastic changes, but it doesn't necessarily mean the end of the religion, only a morphing into a different brand of religion, much like the tobacco companies. People know that smoking is bad, but they buy cigarettes and smoke them anyway. The WTS can survive, promote new doctrines or whatever and sucker in a whole new breed of people.