There are four main options for setting up and using a kitecam while kitesurfing.
Here is a mount you can buy online from Seabreaze. It is designed to take a compact Waterproof Digital Camera.
"Camrig" Kitecam mount
I have used a Pentax Optio W80 which has both interval ("photo every 10 seconds") and video modes. It can take SDHC cards up to 16 Gig. This leaked when snorkelling and was ruined. I have replaced it with a Pentax Optio W90, which has now also leaked.
Pentax Option W80 (SD Card)
I used the W80 for about year, but water got inside the battery compartment when snorkelling (not diving). I flushed it out with freshwater and dried it thoroughly. It came back to life 3 months later, but has subsequently died.
Pentax Optio W90 (SD card)
I bought a W90 to replace the W80 and used it for about 6 months, but water got inside the battery compartment when canoeing. I flushed it out with freshwater and dried it thoroughly. It came back to life but not properly. Pentax replaced it under warranty and I am still using this camera. It has been superseded by the Optio
Casio Exilim EX-G1 (Micro SD card)
Third time lucky. I have purchased a Casio EX-G1 to try it out. Its cheaper - about A$200 - and the seals appear to be more robust and effective than those on the Pentax Optio models. The side one has a thumb screw to cinch it in. So far so good, but I haven't yet got it wet. However, this camera only takes 30 minutes of interval shots and you cannot delay the start time (e.g. 10 minutes) like you can on the Pentax models. It is no longer available.
The latest Pentax camera is the Optio WG-2 which sports an improved CMOS sensor (better for low light conditions) and an improved waterproof rating of 30m. The WG-2 GPS model includes a GPS. I haven't tried this camera yet. For more information see PENTAX Optio WG-2 GPS Review (Steve Digicams)
We use and recommend the Contour Roam that can be set to take either HD video or still photographs at intervals.
GoPro video cameras are also popular for kitesurfing. They have a wide angle video lens and a separate waterproof housing.
The Oregon Scientific ATC-2K comes with both rubber mount straps and a brackets for helmets and bicycles. You get about 1h 640X480 video footage on a 2 gig SD card. More recent models can take larger cards.
Oregon Scientific ATC-2K
Video camera mount close ups, note safety line to kite securing loop
Taken with Contour Roam camera in waterproof housing with Kitehero line mount
Taken with helmet mounted Oregon ATK-Contour Roam camera in waterproof housing with Kitehero line mount
Taken with Contour ROAM with board mount
Taken with Contour ROAM with helmet mount