Here's a list of recent articles, decide for yourself if they're credible:
How Roger Ailes Built The Fox News Fear Factory Rolling Stone 5/25/2011
Has Roger Ailes Hacked American Phones For Fox News The Nation 7/13/2011
Did Roger Ailes Wiretap In The US? Firedog Lake 7/17/2011
Ruper Murdoch's Fox News ran a 'black ops' department, former executive claims The Telegraph 7/20/2011
Most chilling for me, as a whistle blower who has faced similar situations, is the Telegraph's description of Roger Ailes threatening David Brock (who now runs Media Matters) by telling him he would never work again if he published a unflattering article about Ailes.
Expect this story to evolve as more information surfaces.