Jamie on "Impro" with respect to games. I really need to get on and read it.

Clint Hocking's presentation materials - talk, slides, short mpeg - from his GDC09 lecture, "Fault Tolerance: From Intentionality to Improvisation". It's meaty and weighty and it's really, really, really good, and covers lots of bases and I'll need to read it again. Lots of dense stuff about the balances between Far Cry 2's gameplay systems, designing systems for improvisation, and rebalancing games to what they want to be. My mancrush is not abated, sadly.