"It all started with Oprah. A few weeks ago, New York Post reporter Philip Recchia heard that Winfrey, recently embarrassed by the plagiarism of memoirist James Frey, had begun using Barrie's service to vet submissions and make sure prospective guests hadn't cribbed someone else's work. Recchia called Barrie and asked how his service worked, and Barrie offered to test a sample chosen by the Post. Recchia e-mailed a 2005 speech by Hillary Clinton. In a matter of minutes, Barrie found five instances of plagiarism." "Oddly, Recchia decided not to run a story about the senator. (When asked why, he declined...