Listen to the lectures

Here are couple of links which will take you to MIT and UCberkeley.

MIT as you know 'Massachussetts' the toughest to spell state in US is one of the eminent universities in the world has online lectures and courses under OpenCourseWare(OCW) programme.
MIT OCW is a large-scale, Web-based electronic publishing initiative funded jointly by the William and Flora Hewlett Foundation, the Andrew W. Mellon Foundation , MIT, and generous support of the Ab Initio software company.

http://ocw.mit.edu/index.html

I was referring to University of California,Berkeley as UCberkeley. They have started live and on-demand webcasts of select courses and also include some campus events.

http://webcast.berkeley.edu/courses.php