And the winner is...
I thought he was himself: calm, precise, and effective. Yeah, he had some lame arguments, but all in all, he responded to Edwards' attacks, and blasted him when appropriate.
Edwards reminded me of Clinton. Without the bottom lip bite, and not as effective.
I see in some preliminary surfing that some other Bush supporters think Edwards got pounded... I'm not sure if I agree with that, but I do think Cheney won the debate.
What effect will it have? Who knows.