Tim Keller's new book is going to be at #7 on the NYT Best Sellers list this week. Expect a review around here some time soon (in POCBlog time that means - I hope to do that soon and have no idea when that will be).
Also he recently lectured at UC Berkeley with the Veritas Forum on issues related into "belief and skepticism" - you can watch it below from YouTube. Keller is a rock star who isn't one.