In order to ensure device anonymity, the Bluetooth sensors only send a derivative of each device's MAC address to the bridge's main controller, so consider this a Bluesnarfing safe-zone.
While the update isn't available over-the-air, PC users may snag the latest OS with Sony's PC Companion, whereas Mac users can do the same with the Bridge application.
My "luk" was not "werking" as ghosts in the machine mysteriously wiped out the MAC address on the USB HomePlug adapter in the unit I tried, and the HomePlug bridge that I normally use had some compatibility issues.