The Clang documentation was updated this week with a great overview of the new Objective-C syntactic sugar for literals. So good, I can't wait for this to ship.
Really interesting technique for giving fake shadow lighting to a Core Animation layer, smart thinking from Joel Kraut for those times when OpenGL would be overkill.
Great article by Mike Nachbaur on resuming downloads using the standard NSURLx classes, I would suspect that many people should be taking advantage of this and probably haven't bothered. It's easy, go fix your download code now.