According to John Battelle Google is one of the people being mentioned as candidate interested in buying NBC John Battelle's Searchblog: Google - NBC: Very Dumb Idea
But what is new is the suggestion that the best buyer might be Google.
Such a move would be a monumental error. Google is not a company that wants to or probably even knows how to own a major media company. Also, it has outlined a strategy that positions the company as a Switzerland of sorts with regard to major media companies. Buying one of them would kill that strategy.