There is a forum thread about custom trackable micros that the Atwell Family is producing. They will have a common back, icon, and prefix(GT). You can customize the front with your own 2d artwork. They are a fully trackable geocoin not a "TAG" type item. If you order by April 4th there will be an introductory price of 4 dollars each for the first 25 and 2.45 for each additional. I'm considering 50 for myself. If there's interest I thought about a coin with the group logo to. Since there is a price difference for each coin above 25 I thought after we knew how many we wanted to order for the group I would just divide the total cost with the number of coins. I figured to keep it simple the coin would just have our existing logo. I will add the logo to the template for the coin and post it up in a bit.
Details at:
http://forums.groundspeak.com/GC/index.php?showtopic=158068&st=250
Order and Template at:
http://www.atwellfamily.net/geotags.htm