Protothreads are stackless, lightweight thread-like contexts with full blocking, and licensed like BSD.

Very, very nifty. I just need time to read the source and play with them. Protothreads are also making me think about looking into the fate of stackless Python and microthreads.

And if you haven’t heard, Pygame (with SDL) makes coding a prototype MMO client a lot easier and faster. See also Bruce Dawson‘s 2002 GDC article about Game Scripting in Python. (Also consider LuaSdl for prototyping.)