Nope, no points for stumping everyone, even though that's quite a feat with this knowledgeable group. I guess the point is that a good question should be answerable (even if you might have to drop a hint or two on the tougher ones), no matter how fiendish it is.
And while questions won't score you points, it can be very gratifying to receive a round of applause after the answer to a particularly tricky or interesting question is revealed.
Really liked that perfect game question, by the way!
(Hmm... since I answered this, do I get a run? Just kidding...)