The meeting was reported the day after in Eric Alterman's blog. It has been corroborated by others in attendance, but not publicly.
I agree that Pitt's reputation as a self-serving lackey is known, but his detailed account of what can be construed as a concerted plot to fix a primary election has not been contradicted by any of the participants. In a recent reference to this meeting, Pitt gleefully related his experience in the tackily decorated bathroom of his sophomoric host.
I try to remember to post this in appropriate threads here as I consider it of enormous importance.
Bill O'Reilly reported on this around the time it happened but since the powers that be were all at this meeting O'Reilly's reporting on it was ignored.