Arianna has her latest installment up and I agree with this point:

"And now David Gregory apologizes. Why? Gregory's a reporter. McClellan was being a jerk. So why the apology?"

I found that odd too. What went on with Gregory was off camera. I wonder if the powers-that-be over at NBC made David do it because the apology played into the "press is out of control" meme that Mary and her pals have been trying to sell us all week.