Data mining hinges on one reality about life on the Web: What you do there leaves behind a trail of digital bread crumbs. Companies scoop them up to tailor services, like the matchmaking of eHarmony or the book recommendations of Amazon. Now colleges, eager to get students out the door more efficiently, are awakening to the opportunities of…

A software program that searches for offensive content on college athletes' social-networking sites has drawn skeptical reactions from legal experts, who say it could threaten students' constitutional rights. Billed as a "social-network monitoring service" and marketed exclusively to college athletics departments, YouDiligence was on display at…

In the process of trying to preserve Internet history by archiving it, a company has developed a powerful Internet search engine that provides information on Web site usage patterns, which can act as a relatively objective source of information about information sources and can link sources that a researcher might otherwise miss. However, issues…