At least I'm not alone. I run a Drift HD 170 on my bike and the idea of mounting the camera on the top rail of the 500 is in the works. I found a rail mount with Drift Quick Connect for about $30.00 and that can be broken down to the 1/4 stud for other cameras also. The low profile of the Drift 170 should work out pretty well.
I get a lot of questions about why I keep a camera mounted on the bike all the time. Well, in case somebody does something stupid and involved me. I guess that answer would apply to a shotty mount also would it not?