Hi Magic Lantern,
There is an option of "REC key -->HalfShutter" in the Movie menu, which enables to start recording using remote control. I would like to propose enhancement in order to be able to start the recording by Motion Detect, which is already available in Shoot menu for taking pictures. This could be done by e.g. extending the Motion Detect module to "virtually press the shutter button" instead of directly taking picture. This "virtually pressed shutter button" could be then interpreted by REC key in Movie menu.