Open Yale Courses - Game Theory
oyc.yale.edu
oyc.yale.edu
I've started two and think both are very good:
Yale, History of the US civil war with prof. David W. Blight
and
MIT, Physics: Classical Mechanics with prof. Walter Lewin
Also, if you're at the intro to physics level, you should really check out Shankar's physics lectures - I had Shankar several years ago and his classes (and books, for that matter) were excellent, he's a real fun teacher to have (though I can't specifically vouch for these lectures, as I haven't seen them).