It took me a while to figure out why you linked to Dennett, as he's not a preacher (except in a larger sense as a professor), and he's not obviously agnostic or atheist on his web page. But then I found a link to this paper: Preachers Who Are Not Believers, so I guess that's what you meant.

This sounds like a really interesting book, I'll be sure to read it if I come across a copy.