re: Brewster Jennings
Plame's status as some immensely critical national security agent is largely an invention of the Left. I have seen no objective source backing it up, and a lot of sources showing how the CIA was less than vigilant in keeping her cover intact.
I have heard "insiders" say one heck of a lot about the investigation. Most of them were wrong about the outcome of the first one.
Somebody else might be nailed for concealing information, or giving false testimony, but nobody is going to get hauled up for anything remotely related to the actual act of leaking Plame's name.
She wasn't an overseas covert agent. It isn't a crime, and never was one, and I fail to see how any additional facts would come out after two years that would change that.