Well, I don't think you're any worse off than you are with credit cards now (and having a good search of my own purchase history sounds sort of cool), but the problem is that you might buy something that nobody but 3 guys in some corner of a federal agency know is a felony, like import lobsters from Honduras in plastic bags. http://usgovinfo.about.com/od/rightsandfreedoms/a/alobsterst...