The KeyCase iPad Folio, a new iPad case, has received approval from the U.S. Federal Communications Commission, opening the door for a potential stateside release. This leather folio-style case features an integrated Bluetooth 2.0 silicone keyboard that also helps the case serve as a stand. The keyboard is powered by a built-in rechargeable battery good for roughly 45 hours of use per charge; the battery charges using standard Apple charge/sync…