Developers will need to agree to new Developer Program License Agreements prior to being able to download or even glance at the new materials. The Xcode 4.5 Developer Preview is ready for your developer love, and iOS 6 beta version 10A5316k is available as well.
Those interested in the Apple TV will rejoice in the fact that a new Apple TV software beta is available. iTunes 10.6.3 beta is ready for download, as are pre-release versions of FindMyiPhone and FindMyFriends for iOS 6.
Mac developers will find Developer Preview 4 of Mountain Lion ready to go, as well as Mountain Lion Server Developer Preview 5.