Preview at WWDC likely in June, followed by September launch.
Mac OS X 10.6.4, Safari 5 and Xcode 4 Coming at WWDC
- Safari Reader: view articles on the web on a single, clutter-free page
- Bing Search Option
- Improved HTML 5 support
- Safari Developer Tools
- Smart Address field
- Tab settings
- Hardware acceleration for Windows
Meanwhile, MacRumors has heard that a major update to Xcode (version 4) is in the works and will also be demonstrated at WWDC.