I haven't tried this, but thought it was a pretty good idea! Instead of just having your name and address on a pet tag, I thought it was cool that you could have all the information. Especially if you have a senior or special needs dog. Here, check it out. What'dya think??
http://www.healthtechservices.com/PTHowItWorks.html
It's also cool because you can put info on it if your dogs going to a petsitter or something, and you don't have time to give them all the info, or you leave something out. I'd like to buy one, but it's a bit expensive for my budget. Oh well! I guess I'll stick to the old fashioned way!!