Have you considered custom coins instead of a ChipCo chip? I've been considering doing this, as a coin is a better keepsake, and makes a better card protector.
Of course, I doubt other people would want a greek helmet or owl on one side of the coin, but I like the AA on the first example...
If you could get a bunch of people to agree on a design with color and epoxy, they would look fantastic, IMO. Here's one site I found that seems to have good prices. There are probably others that may have better prices, but this was the only good one I could find that sells less than 50 per order.
www.honorcoins.com
