I am trying another alternative.
I had great results with the Liquid Image Skiing Video Goggles for videoing windsurfing, but they prooved not to be waterproof enough to last.
They are fantastic for Skiing and motorcycle riding though!

I had seen that Liquid Image were advertising that they were developing a 'swimming goggle camera', but they never seemed to be available from their website as I kept checking. Then, this year Liquid Image appears to have gone broke and stopped production, but I found some of the swimming Camera goggles on E-bay advertised very cheap and ordered them. They just arrived and they look like they will be excellent and are a lot more waterproof as one would expect. I'm yet to actually try them for windsurfing. Hopefully soon.

In the picture below, the camera lens is folded back on the top side with the headband hinge. (1080 @ 30fps or 720 @ 60fps.) Around 1 hr continuous recording, same as the skiing goggles. Worth a try as they cost me less than $80.