I don't see Washington Post writer Walter Pincus on the testified list nor do I see David Corn who was the first to actually name Valerie Plame in print.
I don't believe Corn was ever interviewed and he should have been, Plame was obviously a source and known to him.
Pincus cut a deal where he responded under oath to some pre-agreed upon questions from the Prosecutor--questions which quite obviously did not explore his prior knowledge of Plame--And he certainly had some--both thru social and professional contacts in DC and because one of his first interviews was at the Wilson home and she was there at the time.