Somerby is a hack, but he's not the sort of hack who's completely drank the Kool-Ade. A good fact-checking of an over-the-top partisan diarist at Kos, in which Somerby makes the case that Robert Novak doesn't seem to be lying, his original story seems to hold up, and his first source -- first identified as "no partisan gunslinger" -- may have been a CIA agent, as he later wrote.
Thanks to The Blogometer, with more on the latest on PlameRoveWilsonNadaGate.