Didn't Zee use a long pole on his euro trip, I'm not 100% but I seem to remember him doing some footage from the front of the bike looking back..
IMO any reasonably long pole attached to the front with a camera on would have to be fairly substantial and solidly fixed, possibly to the frame. Around a foot long at a guess to get any decent shots, ie: bike/rider/background, you would have to factor in vibration, wind buffet and trying to not look at the camera...
With the GoPro having such a wide angle lens I reckon that you could get away with a J-mount on the mirror stay. I'll have a play with some sticky mounts tomorrow and see if I can get one to stick around the mirror stay bolt. Getting it to angle backwards properly might be a struggle though.
