Here is an interesting link that mashes up a short history of the Smothers Brothers show with the manipulative effects of search engines algorithms. It is short and worthwhile read. http://lauren.vortex.com/archive/000970.html
To get an idea of how great the Smothers brothers were one could start with this video where they have the Wh0 on their show and Tommy Smothers offers his folk guitar up for smashing. http://www.youtube.com/watch?v=d9-JdubfUCw It took real courage to put the Who on your show back then.