I was not overly impressed with the whole thing. I like Gwen Ifill in general, but I did not like how she was putting out rambling questions that where both vague and specific at the same time, creating a mess.
Cheney was being a bit of an asshole and well, a liar. I have my bias, but he was saying little and just harping. Denying he never implied the 9/11 Iraq link was the lie of campaign so far. I still have heard almost nothing about what they will do on any topic, beyond fight terrorism and the blah blah blah on what they have done. Edwards was better, but did not put forth a great effort. He seemed a bit jumpy, but that may have been just because he was sitting next to Cheney, who actually less animated than Al Gore.
I would call this one a draw, as I think most pundits. It will have little impact, and as I said before usually does not. Friday will be filled with enough tension, I think would could get some tears from Bush.
Wes has comments too. Covington Jim scores a win for Edwards.
UPDATE: Andy Sullivan gives it a big win for Edwards. I don't see it as such, but hey, I will take it.