Back in 2006 the MidCounties Cooperative made the news when it introduced "Pay by Touch" - a system to allow shoppers to pay for their purchases at the checkout using a pre-registered fingerprint biometric. The scheme was hailed as a success in the UK, but that opinion hasn't applied across the board - Pay By Touch has just shut up shop. In my opinion this was a case of a solution looking for a problem, and until we see a broader switch from existing plastic cards to new tokens (possibly mobile phones?) we won't get widespread acceptance of biometrics for payment purposes.