From what I've seen, the vast majority of American "news" channels are hideously biased one way or the other (although there appears to be more right-wingers) and you don't get anything impartial like the BBC. Maybe CNN, but I'm not sure.
I don't watch them that much but I think even Channel 4 news and (to a lesser extent) ITV are pretty non-biased in what they report.
Of course, I can't ever imagine Americans being willing to pay anything at all to get the impartiality of something like the BBC, so they're stuck with what they've got.
As for FOX news and the likes of Glenn Beck, Bill O'Reilly and that moron woman that came up with the Mass Effect thing, they're all a bunch of nut jobs.
Beck in particular - I heard him once tell some scared woman that euthanasia is where the government kills you if there's too many things wrong with you, so that's why it shouldn't be legalised. And she believed him.