I like Stefano's idea of only displaying minimal ID info for the task. This currently is acceptable in truncated credit card numbers when dealing with the credit card company in communications, so you already are aligned with federal guidelines. Concurrently, the card should be able to display non-truncated verification for events in which the 3 ID references might need to corroborate each other (at the DMV, when applying for federal student loans or federally backed mortgages.

I'm a bit leery of an aluminum / metal card. I could see it would add to the ability of embedding chip sets that require activation via push buttons, and to support the reader requirements of the biometric function, but the converse of rigidity is that it could be an awkward carry in a wallet or purse - I sit on a lot of credit cards and they conform to my wallet under immense pressure [ ;-) ] but they then spring back to their form for insertion into devices like ATMs. A user issue, to be sure, but nothing to detract from the concept.

Another source of research is the parallel with current military IDs that carry passive read-only info to include the holder's medical history. Would need to be protected, but could be invaluable in events where the holder is unconscious and medical staff need to insure they don't force an inadvertent allergic or medication reaction.

All in all a great concept that could spawn a multitude of applications for verification.

Great idea until the damn batteries go flat and you standing in front of a police officer at 1am or you stood in the bank queue for 3 hours only to get to the front and they wont let you withdraw from your account because the card doesnt want to work and you have to wait 3 weeks for a new one. We will have to wait and see in the meantime let them just scan my ID with a reader. www.card-reader.com/idscan.htm