I use two cameras. Nikon CoolPik 100 and 120. The 120 is newer and does HD video. I like them both becuase I can also get stills out of the same camera and both use AAs instead of rechargables so I am never trapped for loack of a charger.
I use RAM Mounts and a Gorilla Tripod. RAM is bolted onto my handlebars (left side), the Gorilla I have used all over my bike. including the rear luggage rack. (Here is a video I shot of my son doing Tail of the Dragon, that I shot off the back of my bike:
It is one of my favourites)
Finally, I have started using VReveal to tone down the vibration I get while riding.