I think Mr. Willis is either a lunatic or desperate for attention. I think he should get the latter, as a poster boy for creationist rationality.
I discussed Willis and the Lucy's knee joint claim in the fourth ApostAZ podcast.
(Willis is not actually in Kansas, but in Missouri, where he runs "The Berry Patch.")
UPDATE: Ed Brayton has a more detailed take-down of Willis' latest at Dispatches from the Culture Wars.