Implementation? For the military or other large agencies, easy. For the rest, purely do it yourself I would think.

Value? Great, for those of us who take daily meds to remain somewhat healty. I did the el cheap version, and had my important daily meds, plus bloodtype, imprinted on one of those red dogtags.

If too much info was on the Zaptag I would worry about security, should it be lost. Passworded? If you are "out of it," I have to wonder how the emergency folks would know get into if to retreive the info??? And if anyone can get into it, I would worry about having too much next of kin type info, just in case of capture by the bad guys...