Some professors, librarians, and administrators have begun using Twitter, a service that can blast very short notes (up to 140 characters) to select users' cell phones or computer screens. The practice is often called microblogging because people use it to send out pithy updates about their daily lives. No need to wait until you are back at your…

For years college administrators have warned students to watch their step in online social realms, noting that sharing too much could hurt them later on if future employees saw their drunken party pictures or boorish writings. Now that professors and administrators are catching Facebook fever, they should heed their own advice. The author…