This isn't a reques for a specific movie so much as just a general question that I felt fit best here.

A couple of years back, I first saw the American film 'Ghost World' which opens up with the main character watching a 1966 Indian film by the name of Gumnaam. The sequence shown features choreographed performers dancing to the song "Jan Pehechan-Ho" as performed by Mohammed Rafi. The energy of the clip and the song being performed absolutely amazed me! I didn't realize that such radical and innovative rock and roll style was coming out of Bollywood in the 1960's.

The question I have is a simple one: are there any good internet resources which I can go to in order to learn more about such movies and the culture that created them? What do Indian people think of these films today? Thanks in advance!