The 2011 Edition of the Guide completely updates the comprehensive marketing and operating data and online sales information on each Top 500 e-retailer, which is the basis of our proprietary rankings. This all-new edition once again expands the detailed profiles of each e-retailing business in the rankings that are written by our editors. We expanded and updated sections for social networking, shopping comparison site affiliations, site search features and functions and mobile commerce applications. An entirely revamped front section contains even more detailed stories and charts that examine in-depth the Internet and mobile commerce trends that are reshaping the retailing industry's future. This all new and expanded Top 500 Guide® is an indispensable strategic reference tool for retailing on the Internet—a glossy, 464-page publication that's packed with all new financial and operational data on each of the 500 largest retail web sites in the U.S