There's a great article on the "Liberal media" and so-called 'liberal bias' of the mainstream press over at The Nation magazine website.

Written by columnist, Eric Alterman, the article may not change your mind, but it certainly is a great answer to folks like Ann Coulter and Bernard Goldberg, whose NYT bestsellers set out to 'prove' such a bias exists. The best thing about Alterman's piece is that he demonstrates that even those places where we think we might get a liberal perspective, the Powers That Be have all but ensured that even that is 'balanced' in favor of the Conservative to Right positions.

Personally, whenever I hear the phrase I immediately know that I can tune out just about anything the speaker is going to say, since I know where they are coming from.