I built a camera holder to my bike for my Canon Ixus 80IS mainly just for fun and to get some biking trip videos or what comes to mind. It was supposed to be just a simple holder but once again things got a bit over-engineered :) Little bit of refining has to be done on the springs but good for now.
The brownish thing on top of the aluminum is some cork mat that I cut to be under the camera so it stays nicely in place after the screw is tightened. The bent thick steel wire in the back is used to position the angle of the holder and to give some support to the back side of it. The holder has some offset from the center so that the lens of the camera is in the middle and in same line with the front tire etc.
I went out for a test ride with it after I got it finished. It was already quite late at night so the video isn't the best possible. I'll post a couple more photos tomorrow maybe and a day time video test if it doesn't rain.
Night video: http://www.youtube.com/watch?v=p4qFmy-e81E