The Museum of the Moving Image is a great site to learn about the history of cinema.
The website also features the Pinewood Dialogs, "discussions with creative figures in film, television, and digital media." Interviews include Francis Ford Coppola, Thelma Schoonmaker, Terry Gilliam and Jerry Lewis to name a few. You can listen on the site or subscribe to these interviews as a podcast.
Really great stuff - check it out.