I don't really use Windows.  I have a Vista partition on my laptop that I use for compiling and releasing projects, but it's a 32-bit image.  I honestly don't care enough about Win64 to buy a copy, but there are obviously people who do want to run PyOpenGL on it.  So, any Win64 developers feel like figuring out what's wrong with PyOpenGL there?  I'm guessing it'll wind up being something fairly straightforward like using the wrong DLL or something like that (PyOpenGL works perfectly fine on Linux in 64-bit, so I doubt it's a fundamental problem).