The LLVM 3.0 release was made on Thursday by Apple's Chris Lattner after a brief delay. The release announcement with more details can be found in this mailing list message.
A few days ago I wrote about the exciting fun in LLVM 3.0 along with the Clang C/C++ compiler enhancements that have come in the past few months. That article contains the full details about what to expect from this open-source compiler infrastructure release. More LLVM 3.0 benchmarks are on the way.