Well, KillCreek seems to be hot property lately. The Avault has an interview up with her. I'll go ahead and paste in some of the stuff that you actually want to know about. (her appearing in PlayBoy, duh):

AVault: Some people see a curious leap from you designing games to posing for Playboy. What can you tell us about the piece that will be run in the magazine? Killcreek: Playboy has expressed an interest in featuring me in the minor celebrity section. The focus will be on games. The pictures are currently scheduled to be taken in early October.