There's one thing that this confirms: Ben Bradlee should be testifying before Patrick Fitzgerald's new grand jury. I don't care about source confidentiality; whoever leaked this along with Scooter Libby seriously damaged American covert counter-proliferation efforts, and deserves what's coming to them, no matter how we find what that is.
But what's more interesting is that Armitage is a possibility. Armitage isn't a neoconservative; he's a realist, a intelligence community and military veteran who sided with Colin Powell the vast majority of time. He was skeptical about the war, as was Powell. Why would he, of all people, agree to do this?