"But the issue of Valerie Wilson's status underlay every aspect of the CIA leak investigation; indeed, it was presumably the threshold question that Fitzgerald had to answer before proceeding with the probe. Why he has so far refused to provide any information to Libby's team is simply not clear."
No, it is quite clear that Ms. Plame's status is not germane to a perjury case. See Martha Stewart - guilty of lying to fbi not charged with violating stock trading rules and inside info.
"Fitzzzzzzz is not the problem. He is a stone nut case trying to save face. It's the judge that I'm more concerned. He is stonewalling and totally not enforcing the disclosure right to the defense."
There is no "disclosure" right or a "discovery" right in a federal criminal case. The feds do not have to disclose information to the defense that tends to show defendant is guilty. The feds do have to disclose "exculpatory" evidence (evidence which tends to show a defendant might not be guilty). This is called Brady material and the discretion of what to turn over is in Fitzy's domain. If Fitzy fails to turn over what is later determined to be Brady material his career will be essentially over. Also, all grand jury testimony is confidential and is not turned over to the defense until the time a witness testifys during trial (so the defense can examine to see if the two testimony's are consistent.)