NNDB

According to its website, "NNDB is an intelligence aggregator that tracks the activities of people we have determined to be noteworthy, both living and dead. Superficially, it seems much like a "Who's Who" where a noted person's curriculum vitae is available (the usual information such as date of birth, a biography, and other essential facts.) But it mostly exists to document the connections between people, many of which are not always obvious. A person's otherwise inexplicable behavior is often understood by examining the crowd that person has been associating with.  Eventually, we will have synopses and analyses of creative works by the people in the database, including their books, films, and recordings." 

Website

 * http://www.nndb.com/