Let the battle begin. The two Celtic warriors, Bill O'Reilly and Sean Hannity, are now officially in a duel to the death after Hannity surpassed O'Reilly as the top cable newscaster of the past week. Sean Hannity's Wednesday interview with Sarah Palin averaged 4.2 million viewers, which was sufficient to crack the top ten telecasts in all of cable last week. O'Reilly's interview with Palin averaged 4.12 million viewers. It marks one of the first times that "Hannity" has ousted "The O'Reilly Factor" from the top spot and sets up a showdown between the two opinionated personalities, who both hail...