A front-page story in The New York Times Saturday warned against the newest unexpected wrinkle in the Internet: opportunistic entrepreneurs are offering to online retailers, as either writers or suppliers, cheaply priced positive reviews of their respective wares. Or, as the paper put it, "an industry of fibbers and promoters has sprung up to buy and sell raves for a pittance...Needless to say, I rate this cynical practice two thumbs down...