Brett Shavers has posted the first (that I'm aware of) reviews of WFA 4/e...one on Amazon, and a longer one can be found on his WinFE blog. Not so much a review, but Corey refers to the book in one of his recent blog posts, saying that he's still digesting it. He also refers to the RecentFileCache.bcf file, as well as to a tool I wrote and provided with the book materials for parsing it.
I greatly appreciate the time and effort folks are putting into reading and digesting the book, and particularly those who are writing reviews. Thank you, all.