I caught part of a discussion (call-in) about the Schiavo case on Newstalk 106. One caller brought up a case I had heard about before, but had forgotten. Jason Clarke, son of Simply Painting's Frank Clarke, was in a "permanently vegetative state" for a number of years. His doctors had told his parents that there was no hope.
However, the parents didn't give up and they tried some alternative, Chinese remedy and Jason came out of his vegetative state. Apparently he's essentially the same today as he was before he was injured (I believe that's what happened). The caller's message was basically, "Where there's life, there's hope". {I couldn't find anything about this online.}