When Imo crammed free voice calling into its iPhone application, it neglected to port the functionality to its large-screened counterpart. Now, the iPad version of Imo.im is catching up -- adding VoIP support over 3G, 4G or Wi-Fi to other Imo users across iOS and Android. The latest version of the instant messaging aggregator boasts revamped photo tools too, featuring group photo sharing and real-time image uploads. These tweaks accompany a slew of design changes, including a color-coded status in
