I was introduced to artist Matt Siber a couple of days ago, with his work highlighting our saturation with advertising and isolating the information we are fed.  His works are really quite inquisitive and make you look back and forth as to what is actually being shown in our everyday lives. 


Here is a link to his website: http://siberart.com/

Also checkout b
ill boards and sign work by artist Mark Titchner that works a long similar lines I am currently investigating..