There have been pen phone concepts before, even a few working products, but none as slim and small as this one sent us by an anonymous tipster. He told us this "design A" is not a finished product yet, and added that the undisclosed company he's working for wants to gauge interest in such a device. While most users will connect the phone to Bluetooth earpieces, those two target-shaped areas on the top and bottom are earpiece and receiver. So far, so good. What do you think, readers?