Statistics:
MMORPG Space game
Client / server
Single shard massive server
130.000 active players, >24.000 concurrent users
World concurrency record on a shard
425,537 lines of Python code and growing.
client: 158,656
server: 218,645
common: 48,236
Possible only because of Stackless Python
Those should silent anyone thinking Python might be too slow...

You can read PyCon2006 presetation slides at:
http://www.stackless.com/Members/rmtew/ ... on2006Pres
This is a sign, with Civ4, that Python is gaining good foothold as a scripting language for game engines. Note: Because FreeOrion is not so scalability sensitive, FreeOrion can go with ordinal Python and not with stackless one.