No big changes in this version of Python Chess, just a few compatibility fixes. I decided version 0.5 was ready to be released to the world, so I posted it on the Pygame website: http://www.pygame.org/project/1099/?release_id=1960. And, at least one person actually downloaded and played! He pointed out some issues/fixes with running on Linux (I had just been developing with Windows).
So here’s the really, truly, cross-platform, Python Chess: PythonChess_v0.6.zip