"Help me out as I thought I was following so closely. Where's Libby come into play - that one is new for me. And it comes into play where in the timeline."
It really looks like Miller called Libby on July 6, 2003, which is the day Wilson's editorial was printed in the NYT.
The crux of Fitzgerald's efforts seems to be to get from Miller what they talked about. Miller refuses to answer. Libby has already testified.
This date, July 6th, preceeds in time all the other supposed links offered in other theories. And it's hard to believe anybody would have given a rat's ass about Wilson before July 6th.
So it is very crucial what Miller said to Libby. And very telling that she is willing to go to jail rather than reveal it. (Libby has already given her permission, from his side.)
Miller is not talking because she knows she would then have to reveal where she heard this information, which could be from any number of people (given her extensive contacts) including Plame or Wilson themselves.
Thanks on the Libby scoop. I get it now.