Some quick links:
The Clay Mathematics Institute is now making available for free online the books whose publication it has sponsored. These include the Morgan-Tian exposition of the proof of the Poincare conjecture. Surveys in Non-commutative geometry, which contains two excellent articles by Jeffrey Lagarias and Paula Tretkoff explaining ideas about the Riemann Hypothesis that have been motivating Connes and others recently. Also the excellent huge group-effort expository volume on Mirror Symmetry, and a more recent volume on the topic, which includes a good review article by Michael Douglas about the string theory motivations for this work.
There’s an interview with Susskind here about his latest book. About anthropics and the multiverse he claims
…since I wrote “The Cosmic Landscape,” it has practically become the conventional view.
Among the posts worth reading over at Secret Blogging Seminar, there’s a nice posting by A. J. Tolland explaining what a “stack” is. The comments contain a valuable discussion about the different versions of a “classifying space” that show up in this story.