Technological Marvels - Fingerprints being used to pay for groceries! What will they think of next--a national ID card? How come I never get to be a guinea pig for this kind of technology? Only years after the fact did I get to use one of those nifty scan-it-yourself machines when visting a Kroger in Columbus. Although, I suppose I did have a chance to use the payment system at High Tech Burrito in Berkeley.