At first, it sounded like another in a long line of credit card breaches: Up to 4.2 million account numbers were stolen by thieves who cracked computers at Hannaford Bros. Co., an Eastern supermarket chain.  But the specifics of the crime, revealed this week, included some troubling twists that might expose big holes in the payment industry's security standards.

http://www.time.com/time/business/article/0,8599,1724709,00.html 

http://www.informationweek.com/blog/main/archives/2008/03/hundreds_of_ser.html

http://www.hannaford.com/credit_card_security/