A great story about the future of shopping and identity management using finger vein patterns instead of credit cards is at NewLauncher.com.
We need to use credit cards less since they are so easily stolen or forgotten at home. I like the finger vein method or iris pictures to confirm identity, although neither is perfect, it takes criminals a lot more work than swiping a credit card blank through a magnetic writer.
A related story on using finger vein identity in a coke machine is here
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