I suspect the Dem's at NBC fed the bad poll numbers to Wonkette and Powerline; not sure who fed them to Drudge -- Wonkette and Drudge went with them and the rest (as they say) is history... so IMO since it was the networks and MSM who commissioned the exit polling (aka cBS and NYSlimes) I'd say the fact it got out to the bloggers isn't the blogger fault --but the MSM fault for not keeping their mouths shut -- or as I suspect purposely setting up the bloggosphere as payback for Rathergate...
The guy from powerline was doubtful of Wonkett's numbers. He was there with her when she was posting them. Powerline did not post them. Kerryites fed them to her and she ran with them.