Update 2: iOS has apparently gotten the release one day early, as episode 2 is now available on iTunes as well. The European PSN for PlayStation 3 release date has not yet been announced. It is also scheduled to be released some time at the end of March for PlayStation Vita (along with episode 1).
Update: It's out now on Xbox 360 through the Xbox Live Arcade.The Walking Dead: Season Two - Episode 2: A House Divided is out now for PC and Mac through Steam and the Telltale store and on PSN for PlayStation 3 in North America. It will be released later today for XBLA on Xbox 360 and tomorrow on iOS.