Sports Illustrated's John Heyman has McNamee's most extensive comments since this all broke. Of note: McNamee says that he thinks Clemens would pass a lie detector test because "He might actually believe that he's telling the truth." Hurm. He also says that he believes Clemens when Clemens says that he had no knowledge of Andy Pettitte's HGH use.
There's obviously a lot more that needs to unfold, but I'm starting to believe that, rather than some head-on collision of contradictory assertions, McNamee and Clemens are going to do a lot of talking past one-another before Congress and in the course of their lawsuit. Ultimately, that may lead to a far more ambiguous resolution than many anticipate.