GOOD NEWS AND BAD NEWS: "Using human embryonic stem cells, researchers have cured a Parkinson's-like disease in rats. Unfortunately, the Parkinson's cure causes brain tumors."
I favor research using embryonic stem cells, as I don't think we know enough to say what will work -- and research with embryonic cells might well provide insights that would let us use adult stem cells effectively. But I think it's being oversold as something that promises near-term cures, as alas it doesn't.