Oxhorn just posted Blizzard's rules for machinima. I guess Microsoft has started a domino effect. Will we finally hear from Valve, iD, and other gaming companies now? Blizzard's rules are very similar to Microsoft's (no commercial recompensation for example) but I don't see anything on fan fiction. Blizzard even has a special email address setup: firstname.lastname@example.org.
We've seen some fantastic progress on the machinima front in recent weeks. Let's keep up the good news.