Of course, both Comcast and NBC deny a connection, but remember that Comcast has a reputation for donating heavily to right-wing causes; could they be "cleaning house" in preparation for the merger? Right now, General Electric owns NBC Universal. After the 13-billion dollar transaction takes effect, GE will retain 49% control - like Comcast, GE is not renowned for being friendly to left-wing causes.
While I did not always agree with Olbermann's leftist viewpoints, there's no question that he was an important counterpoint to the huge onslaught of right-wing punditry that is slowly and perniciously poisoning the much-too-easily influenced minds of the U.S. populace. Balance is important, more so in this era of extremism on both the right and the left.