"PA is winner-take-all. There are 2 proportional states. One, IIRC, is Maine and I can't recall the other one. I know the savvy statisticians know which ones, exactly."
Maine and Nebraska both hand out 2 EVs to the candidate who carries the state and 1 EV each for the candidate who carries each congressional district. No state uses proportional representation to hand out EVs.
"But my point was that he shows the state as 50/50. So why does he give Bush the electoral votes rather than Kerry?"
When you average the ask price with the bid price, PA is actually 51/49 in favor of Bush (there's a sentence to that effect right after the scores).