There is a Q&A with American McGee on HomeLAN Fed, where the Carbon6 co-founder is asked about his production company and the upcoming Oz game. Though American's answers are generally pretty brief or of the "can't say much" type, there's still a bit of new info in there.

HomeLAN - What can you tell us about the actual gameplay of the Oz game? American McGee - action/adventure/quest based built around a linear narrative story with non-linear mini-quests integrated throughout in a seamless fashion. the idea is to create a toy box in which the player can choose his/her own path through the world. ..