I had noticed some odd omissions. He hadn't updated his online bibliography for several years. The Discovery Institute has been feting Behe and Denton, but strangely silent about Dembski's contributions, even though he's one of the founders of the movement. I've also seen Evolution News & Views showcasing newer talent (e.g. Doug Axe, Stephen Meyer).
One reason might be that as an aging mathematician, he may feel his best work is behind him. To be clear, he hasn't recanted his position.
There is, though, some bitterness. I think, not without reason, that he suffers from burnout because he's been burned so many times. He was run out of town on a rail at Baylor. Then he got a job at SBTS, only to resign a year later. Then he landed a job at SWBTS, only to get into hot water with Paige Patterson.
He's been frozen out by naturalistic evolutionists, theistic evolutionists, and young-earth creationists. His statement that "the camaraderie I once experienced with colleagues and friends in the movement has largely dwindled" is striking. He feels pretty alienated. Sad, but understandable. For more background on his motivations: