Windows clang+mingw dev plans?

Seeing the recent Windows (VC++) related posts (particularly the `lib/Driver/WindowsToolChain.cpp` patch) has me curious as to what goodies are on The Dev List for users of clang + mingw/mingw-w64 on Windows.

Specifically, the following issues:

  a) currently active mingw/mingw-w64 clang dev efforts and who's taking lead on each
  b) updated clang build integration with previously installed mingw/mingw-w64 toolchains [1]
  c) posix vs. win32 thread models [2]

Jon

[1] *** CLANG/MINGW INTEGRATION ISSUES ***

After applying the following hacky patch to source from `branches/release_31`

C:\Users\Jon\Documents\CDev\llvm-svn>svn diff tools\clang
Index: tools/clang/lib/Frontend/InitHeaderSearch.cpp