sells all sorts of jewellery, keychains, dogtags, etc with embedded ibuttons. If you got the rings used for unique ID's you could log into PM with your "ring" or "medallion".
I believe I remember stumbling across people who handle custom logos for ibutton-wear. If there is an interest, I will see if I can hunt up the sites again.
if that doesn't put your cereal box decoder ring to shame, I don't know what will:)