Doc: I fear you missed my point...I know who Keith Olbermann is...but what I meant was...Who is Keith Olbermann?
Sorry, I mis-interpreted your question. In answer, he is nobody.
Yes, he did have a "moment" But he again is nobody. The difference between the 2 is that Jon Stewart realizes it, KO does not.
Wasn't he in the Kingston Trio back in the sixties? Or was he the Scot race driver? Well, anyway, nobody of any note.
Well, we do know he was not on the plane with Richie Valens. 
KO looked like he was about to cry in his response to Stewart...."call me, we can be buddies".
Sure! But does Jon really want him as a buddy? Talk about kiss of death.