Cool idea, although I'd say the ICE info on the tag where it is really easy to see would be best. Price is very reasonable too compared to some of the other similar products out there, heck you could even double it and it would still be a very good price.
You are guranteed that someone will look in your wallet for your license if something were to happen. The drivers license is where they are going to look for your contact info.. I think that we can put some info on the tag but there is only so much space....
Either way I think that its a good deal...
CAp