I don't know what kind of criteria we need to hit to call the official start of an App Store price war, but quite a few companies have taken EA's lead from last week and dropped their app prices down in an attempt to get them on the top app charts before this week's store freeze by Apple. Pocket Gamer has a pretty good list of sales going -- most Namco apps are on sale, along with the Pac Man titles and Bit Trip Beat. Halfbrick Studios has also dropped prices on their games, bringing Age of Zombies and
