I am happy to announce that initial HDMI-CEC control has been added to the Raspberry Pi. It is now possible to control your rpi MD with your television's remote control. A compatible television is required. Control should also be possible from your TV remote if you have a PulseEight HDMI CEC adaptor connected to your non-rpi MD.
Current control is one way, work will continue to add external device control in the future.