LLVM/Clang 3.3 is already stacking up a lot of features from defaulting to using the new loop vectorizer, 64-bit ARM / AArch64 support, the AMD R600 GPU LLVM back-end, better support for modern CPU instruction sets, and is C++11 feature-complete.
We have known the LLVM 3.3 release is due in June and now we have an actual release date. As luck would have it, the release date planned is 5 June, the Phoronix birthday. Phoronix will be turning nine years old this June. It will also mark the five year anniversary of the Phoronix Test Suite.
The LLVM 3.3 release plan in full can be found on the project's mailing list. The plan is to branch LLVM 3.3 next week, work on the release through May, and do the final release on 5 June. This schedule, however, is subject to change and could be delayed.