I know this is late to post but I don't think I have seen it suggested yet but I was thinking what about a forum change for example http://gyazo.com/77ae70a280f74e9f200b8ef0661883bc <--That thingy that pops up on your post becomes a different colour for belts after 10th dan and as your belt goes up it changes to a designated colour and say if you got god belt something cooler happened to it or something along those lines. (Sorry this looks good in my head but I'm finding it hard to put it into words)