This one's still a bit mysterious, but what appears to be a Bluetooth module for Olympus' Micro Four Thirds cameras
has just hit the FCC. Exactly what it does isn't clear, but it looks to be a match for the accessory port below the hot shoe on Olympus' PEN series cameras, which could open up a number of interesting possibilities -- a geotagging GPS module, perhaps, or even a file transfer device? Hopefully Olympus will clear things up getting official with this thing sooner rather than later. In the meantime, you can dive into the FCC reports at the link below.