I'm happy to announce that the iPhone SDK beta (released yesterday, available on http://developer.apple.com) includes a beta version of llvm-gcc 4.2 as part of the included Xcode 3.1 beta. For more details, please see the llvm-gcc release notes included in the Xcode documentation. LLVM will also be in the final release of Xcode 3.1 for all Mac developers who are not interested in downloading the beta iPhone SDK.
This release includes many features and enhancements contributed by LLVM Developers from across the globe. Thank you to everyone who has contributed to LLVM!