It has been reported that Libby's attorney tried to work out a plea deal. But Fitzgerald insisted on jail time, so Libby refused to make a deal. It appears that only Libby, in addition to Cheney, knows what Cheney knew, and when he knew, and why he knew, and what he did with his knowledge.
Fitzgerald has clearly thrown a stacked indictment at Libby, laying it on him as heavy as the law and propriety permits. He has taken one continuous false statement, out of several hours of interrogation, and made it into a five-count indictment. It appears he is trying to flip Libby - that is, to get him to testify against Cheney -- and not without good reason. Cheney is the big fish in this case.
Will Libby flip? Unlikely. Neither Cheney nor Libby (I believe) will be so foolish as to crack a deal. And Libby probably (and no doubt correctly) assumes that Cheney - a former boss with whom he has a close relationship -- will (at the right time and place) help Libby out, either with a pardon or financially, if necessary. Libby's goal, meanwhile, will be to stall going to trial as long as possible, so as not to hurt [filthy Bushists'] showing in the 2006 elections.
So if Libby can take the heat for a time, he and his former boss (and friend) may get through this. But should [filthy Bushists] lose control of the Senate (where they are blocking all oversight of this [regime]), I predict Cheney will resign "for health reasons."