I've used a digital camera mounted on my touring bike's handlebars for the last five years. My
first good digital camera, an Agfa 1280, was designed with an LCD monitor on the top of the
camera body and a lens assembly that rotated through 180 degrees. I mounted the camera, with
velcro straps, to a padded platform which I mounted to my handlebar.  I could the use the display
while riding to compose images.

When I wanted to replace that camera with a higher resolution camera - 3 Mega Pixel Casio QV-
3000 - I took a different approach. I got a conventional digital camera with a wide angle lens - 30
mm 35 mm equivalent - and learned to compose my images without being able to use the
viewfinder or LCD monitor. Starting with a 3 MP image allowed me to use only a part of the
original image when creating an images for use on my website. 

I made two different, but similar, mounts for that camera. The first was, literally, ripped off on
a return flight from Europe. Both mounted the camera upright on a platform mounted to my
handlebar. The front of the camera was held in place by inserting its lens into a protective lens
shade / filter holder I made from a plumbing pipe connector. 

A piece of bent coat hanger wire glued to the lens shade and to the platform held things in place
and the other ends of that wire came up behind the camera to keep it from coming out of the lens
shade.  This worked pretty well, but the camera was not held in place well enough to survive a
crash or even a really rough road, so I also used the wrist strap to tether the camera to my
handlebar bag. That camera survived two actual crashes and three other incidents where the
riderless bike fell (or in one case was blown) over. In each case the camera came out of its mount
and struck the ground, but the impact was reduced by the tether.

This fall (2003) I got a new, much smaller 3 MP camera. This camera (Pentax Optio 33L) has the
same, conventional design as the Casio, but the LCD monitor swivels out from the camera body
so that, as with the Agfa, I can compose while riding. It is smaller and lighter than the Casio and,
using the same basic mount design, I have come up with a mount that should keep it in place even
on rough roads. I'll still use the wrist strap as a tether, just in case...