LG's promotional strategy for the G-Slate seems to be to keep officially mum about the device, while letting random pseudo-celebrities tease it out in brief glimpses. A week ago, K-Pop artist Seungri gave us our first sighting of the dual-camera array on the back of the G-Slate, which has today made its triumphant return to YouTube, courtesy of one MysteryGuitarMan. The rear of the device here doesn't look identical to the one in Seungri's video, however the metallic strip separating the cams and its "with Google" branding loo