Figured I'd start a thread on this since it's a fairly important update. Obvious big feature is Build and Analyze. 10.3 SDK is no longer an option, while 10.4 SDK is not enabled by default (same as before with 3.1 and 10.3 SDK). In the welcome/splash window you can hold down ⌘ and the Open button becomes Reveal. I normally don't really like these windows, but I almost always find myself opening Xcode and going to File > Open Recent, so it's a nice shortcut. The default Cocoa Application project is for 10.6 since it uses the NSApplicationDelegate protocol (which was before an informal delegate via categories) and @properties. The MainMenu nib properly fills in the application name instead of being Untitled. Java project and file templates have been dropped as discussed here. Does anyone like this new Menlo font? I guess it takes getting used to but I'd prefer the original one. Feel free to share any other findings/thoughts.