UPDATE : years later...
The last Draft have been officially finalized few weeks ago, in Mars 2011 and will be officially out around July 2011. The name of the new standard would be C++2011 : http://herbsutter.com/2011/03/25/we-have-fdis-trip-report-march-2011-c-standards-meeting/
Microsoft C++ compiler (VC10) provide C++0x features (lambda, decltype, auto, r-value reference and nullptr). GCC provide a work in progress version that already implements a lot of features (see http://gcc.gnu.org/projects/cxx0x.html).
Comeau C++ seems to be more advanced. CLang started to provide some features but not much for the moment (see http://clang.llvm.org/cxx_status.html )
So, most of the features are be availables for the main c++ compilers at the time the ISO administration officially validate the draft. Some advanced features are still not be available before some years I guess.
