NEW YORK (Reuters) - U.S. newsstands sold fewer magazines in the first half of 2006 compared with a year ago, data showed on Monday, as some markets were saturated with too many offerings while others had to compete with the Web. Newsstand, or “single-copy,” sales of magazines fell more than 4 percent to about 48.7 million copies in the first half of 2006, according to preliminary figures provided...