I'm not sure my comment went through on the OP blog, so I'm posting here as well.
Sometime ago some friends mentioned the idea of scout-type badges for achievements in roleplaying (and other gaming as well). Being the headstrong graphic designer hobbyist that I am, I went and got suggestions from various RPG boards and made up some badges.
You can find them here-
Images are mostly clipart or images found on the web, so some rights issues may be involved if you make the commercial. However they should be fine for your own entertainment :)