Introducing: The Free Space - 3D (binaural) Audio Microphone
I designed it specifically to be used with the GoPro mounted on top, with a grip handle for carrying it around. The GoPro is an amazing little camera, and it records stereo in from the external mic!
I also designed the Free Space to be mounted to any standard camera hot-shoe. Note that the grip handle comes with a cold shoe already attached, for quickly changing from one mount to the other... Oh yes I did! Check it out: