There seem to be some solid appellate issues stemming from evidence the judge refused to admit.
I fear that there may not be any justice to be had, for a reason that hasn't had enough attention: Libby's own lawyers, as much as anybody, got him convicted. How did that happen? Ted Wells (let me focus on him) is not an idiot, and I don't believe he consciously set out out to lose the case; but being a liberal, he was blinded by his own prejudice against the administration and therefore against his client. He could not argue any defense except a bad memory (thus conceding, at least by silence, that what Libby said was factually false) because the liberal view of things would allow no other defense.
This happens; lawyers often represent people they don't like. But a good lawyer rises above his prejudice, he doesn't let it control him; and an honest lawyer, if he can't rise above it, doesn't take the case.