Tanya Lattner (yes, the wife of LLVM's lead-developer Chris Lattner) at Apple announced last night the LLVM 3.0 release would be delayed by two weeks. The reasoning is "to allow adequate time to do the final round of testing and also because many working on the release are distracted by the LLVM Developers Meeting."
LLVM 3.0 is now set for release on the 30th of November while today we should see the fourth release candidate of LLVM 3.0 and Clang.
The LLVM 3.0 delay was mentioned in this mailing list message.
With LLVM 3.0, the LLVM-GCC project (a GCC front-end to LLVM) is being discontinued in favor of the DragonEgg GCC plug-in that provides similar functionality on modern versions of the GNU Compiler Collection.
The LLVM 3.0 release is coming just one month after the Open64 5.0 compiler release and several months ahead of GCC 4.7.