It was just a matter of time, really -- we're well acquainted with Facebook letting us tag friends in our photos, so it's no shock that a similar feature has just spread to the social network's mobile darling, Instagram. A version 3.5 update to Instagram's Android and iOS apps lets users tag others in a shot, whether or not they're human. After that, a Photos of You section in members' profiles can show any photo linked to that account. As y
