Bluelounge has a history of coming up with unique ways to mount and charge iPhones; Rolio ($10) is the latest such accessory. The white plastic square combines cable management -- you must provide your own Lightning Cable -- and a way to hold your phone upright while it's charging. Once the Lightning plug has been secured into a molded holder at the top, and the cable has been wrapped round the center of Rolio, you stick the USB plug through the center.…