Brian Greene wrote a book called The Elegant Universe and hosted a TV program with the same name for the PBS series NOVA in 2003. Visit the NOVA web site to explore what other leading physicists think of string theory: http://www.pbs.org/wgbh/nova/elegant/viewpoints.html. Does your perception of string theory change after you read a few of these interviews? If so, how?
If you want to go really deep, watch all three hours of the program online: http://www.pbs.org/wgbh/nova/physics/elegant-universe-einstein.html
Brian Greene http://www.briangreene.org/
World Science Festival http://worldsciencefestival.com/
NOVA: The Elegant Universe http://www.pbs.org/nova/elegant/
Science Friday Desktop Diaries: Brian Greene http://www.sciencefriday.com/videos/watch/10369