"A network of around 37-ish servers of all different shapes and sizes, spread over three sites, specifically geared towards the needs of open source projects like Python."
Really cool and will help Python be even more cross-platform friendly.
Sadly they don't have OS X on any of the machines. It seems that maybe this has to do with HP and Microsoft being sponsors and OS X not being allowed to run on non-Mac hardware. Maybe someone can contact Apple and see if they can give an X-Serve or two.
That's already in progress. Also, many of the core devs that I know about run OS/X so it does get a lot of flexing.