MIT open courseware.

6.001 Structure and Interpretation of Computer Programs

6.033 Computer System Engineering

There was also an advanced data structure course. 

All of them are pretty interesting.  My weakness has always been system knowledge.  (Ah. I am not such a geek.)  And I would like to be broadened by lisp for long time.  

But anywho, just take a peep. I would probably just go a little bit deeper in the advanced data structure course.  Since one day I would need to go deep in topics such as balanced tree.