I've been doing some experimenting with gcc, more specifically to g++, and finally got something to actually work.
Currently I have implemented in g++ the "Static Assertions" and the "Right Angle Brackets" C++0x features in g++. Those are the simplest ones that got into the working draft, or so I thought; it took me a while to learn the source code nevertheless. I just set up this page with patches and other stuff: http://mndfck.org/~pedro.lamarao/projects/c++0x/ I intend to try next to implement the "Delegating Constructors" feature. Any feedback is welcome! There is a lot of talk on "branches" in that page, but currently I'm working on a file:// Subversion repository. Soon I'll try (again) to put that one up in a public place. I'd like to eventually contribute these to the project; but feel it is very early, the next C++ standard itself is still far away from us. -- Pedro Lamarão