My collegue came up with an idea if anyone wants to try to build a concept based on it please feel free.
Perhaps a standard emoticon (Yellow smile face or similar) on a surf board, on a wave.
It obviously would be too detailed to work well at a small size but we might be able to find an alternative. Or maybe you could make it simple enough to work at a small size.
Here is a sample he found on the internet of what he is thinking, perhaps with or without the body.
http://www.flickr.com/photos/richardandgill/2686148829/