You may already be a victim of cellular "records rip-off" and not even know it. Anyone -- a stalker, a jealous lover, a curious employer -- with merely your cell-phone number can visit one of several Web sites, pay around $100, and in a few hours find out whom you've been calling and who's been calling you. Indeed, the Web site Americablog revealed last week that it successfully obtained the records of Gen. Wesley Clark, the former presidential candidate. "All we needed was General Clark's cell phone number and our credit card, and 24 hours later we had one hundred...