I was in two minds about this. I pulled this screen grab from THIS VIDEO. It's a shot of my friend Ian Wraith riding his surfmat at Mawgan Porth. Being a screen grab, you tend to lose a lot of clarity but I think it still has an interesting effect.
The GoPro camera does give the option of taking photo's with a 5MP camera using the 135 degree fisheye lense. Certainly something to explore.
Anyway, here's the shot.