Given the continued interest I thought I'd contribute my effort at a win64 build of VLC using mingw-w64 (GCC 4.6.0).
I can get make to complete successfully with ./configure --disable-lua --disable-qt4 --disable-skins2 --disable-activex
Unfortunately, despite finding a mingw-w64 build of qt on drangon.org/mingw, I couldn't get it to work with VLC, so there's no GUI and I can't get video to work; the file adds to playlist fine and play doesn't report any problems (as it does if a plugin is removed), however no video is displayed while memory used increases to 1GB before dropping to 20K. (The file plays fine with the official version.)
Files are here if anyone wants to use them, or check to see if the video problem is something stupid (I'd hoped since SDL is used, it would be possible to activate SDL video from the commandline). However I suspect there may be pointer referencing / memory leak issues, given the symptoms.
http://drop.io/rtmrqhn
The vlc64110.7z file contains win64 binaries for VLC as described above.
The vlc64110lib.7z file contains my 64bit libraries for msys, along with one modification to VLC itself to remove STDCALL references, and should save some work for msys users (although note a few libraries have reduced features, for example the FLAC library was compiled with --disable-ogg due to VLC linking problems with my original compile).
The vlc64110src.7z file contains unmodified mirrors of various (L)GPL dependencies, in an effort to ensure GPL compliance (hopefully I haven't missed any). I put the one modified file in the lib archive, to save users who already have these a 37MB download.
One other thing, I did get an error running make install, where vlc-cache-gen couldn't find plugins I'm 100% sure existed:
[0x386e90] main libvlc error: No modules were found, refusing to start. Check that you properly gave a module path with --plugin-path.
No plugins in C:/msys/local/lib/vlc/plugins
make[5]: *** [install-exec-hook] Error 1
make[5]: Leaving directory `/e/code/vlc-1.1.0/modules'
However when I try to run it, the stated --plugin-path option isn't accepted:
e:/code/vlc-1.1.0/bin/.libs/vlc-cache-gen.exe: unknown option -- plugin-path
Thanks for all your work making a quality free media player!