" If there was no evidence that Libby lied to the GJ, this indictment would not have come down" We'll have to see how strong that evidence is, when (and if) we hear the other side of the case. Allegations sound strong when you only hear one side.
My point is that this factoid is irrelevant, except inasmuch as it makes Plame a subject of speculation, i.e., she's not a public figure or otherwise well known; so discussion about her role in the Wilson visit fits the category of "things people might speculate about and be interested in."
Even if her status at the CIA is desk-jocky, and she has NO covert status whatsoever, the allegations in the indictment still hold water.
That's because the only allegations against Libby are that he was not truthful with the GJ, regarding where he first heard of Plame. Libby tried to finger reporters as his first source (alleges the indictment), when in fact his first source (and he knew it) was his independent inquiry to the CIA.