According to Chicagoist, Cub Foods stores in Chicago will start using a biometric payment system in November. The Pay By Touch system will enable shoppers to debit their checking accounts through a device that scans your finger, and uses its unique measurements as identification.
The comments on the post are interesting, including melodramatic (and not serious) suggestions that thieves will chop off fingers, etc. The comments touch on the privacy concerns, and the extent to which stores will be able to protect the customer information in the resulting databases. Hopefully the biometric information will be considered similar to, say, ATM PIN and credit card number information.