Lao shi loves his 20 000km achievement badge (his avatar on GPSTC site) and suggested others might like one too - 40 knot club, 10 000km etc, which you can wear for bragging rights on the beach.
Just canvassing here to see if there is any interest in the idea.
Pic of badge in this thread:
www.seabreeze.com.au/forums/Windsurfing/General/For-the-classy-windsurfer/Alternately they could be made in the style of the tie pins, but with print on a plain bar rather than dichroic.