I was prejudiced by previous limited exposure to O'Reilly and Dawkins to not really want to take the time to download this vid and watch it. However, I thought it was pretty good. I'm surprised by O'Reilly's honesty. I thought they both did a reasonable job of presenting their views.
As far as being rude, I do think Dawkins is polite in the words he uses, but so disrespectful in his attitude and so arrogant that to me it's rude. Off with his head!
But O'Reilly was a little less composed, the fascist comment is ridiculous, and I liked it when Dawkins told him not to shout. Also liked O'Reilly's comment that his belief in Jesus doesn't contradict Dawkin's science.
As far as which one I'd like to see get beng-chuan'd on a San Francisco bus, it's Dawkins by a huge margin.