School: University of Chicago
Product or service: Online community for collectors of stamps, coins and other items.
Visitors can use Collectica.com to upload, link and trade with peers as well as use auction and appraisal services. The site generates revenue through e-commerce and advertising. Pictured (from left to right) are founder and president Michael Dworecki, a serial Internet entrepreneur; VP of software development Tu Nguyen, who has designed software for major institutions; Samuel Dixon, head of community development and buzz marketing; and William Thoburn, head of community development and partnership marketing.