Science theory video on-demand as well as Quantum Space theories
Brian Greene's NOVA's The Elegant Universe from PBS is viewable on QT or Real. This is viewable as streaming (not download) and this talks about the current physics science. This should be accessable to non-Physics gear heads. This is another article about physics which tries to unify the four forces of nature : strong force, weak force, gravity and electromagnatism. And another. And another (non-free but peer-reviewed) from Scientific American