[boost] [clang] How to use CLang for Windows?

There was a recent conference where the Clang team announced a version of Clang that's supposed to work on Windows (as opposed to kind-of working if you try real hard). It's accessible from the command line if you put Clang in the PATH. I just found out it's supposed to be used from Visual Studio ('10 or '12) after tweaking a project's settings. Can it be used from out BJam system? How will it find right header files to use? (Does it automatically use the ones from MSVC?) Daryle W.