Namebase is a terrific resource used by investigative journalists (real ones), which provides relationship maps between important individuals and corporations that may otherwise go unnoticed. Plug in a high profile name and see the cloud of co-conspirators (or innocent associates) appear before your very eyes. PIR hand built their database by painstakingly scouring books and public documents, and it’s truly a unique tool. Don’t be misled by the lack of fancy graphic design, this is one powerful site. You’ll find a wealth of informed articles there and other search types to use and peruse as well.