CLICK TO READ: The Washington Note - by Steven C. Clemons
This is all pretty much speculation at this point, but Steven Clemons poses an interesting question: "Who is Patrick Fitzgerald's "Deep Throat" Source? Is there a Counter-Leaker on Plame Case Working for the Side of Good?"
His reasoning makes perfect sense (and I sure hope it's true): "There is a high level official in the Bush administration who helped give the "inside scoop" on the earliest moves by the White House in the Valerie Plame investigation -- but who is it?
On September 28, 2003, Washington Post writers Dana Priest and Mike Allen clearly note the existence of a source with knowledge about the outing campaign conducted as "a vendetta" against Joe Wilson by senior officials in the Bush White House.
This source clearly had concerns about the behavior of these officials, and to some degree, this Washington Post source appears to be a key "counter-leaker" in the Valerie Plame investigation, i.e. someone attempting to make sure that the real story about the Plame leak and reasons for it were told."
Put on your detective hats, and click on the link above to read the whole article.