I wonder when the television will be swallowed by the Internet… With the acquisition of YouTube for $1.65 billion, and with the explosion of free tv online sites, I think we are quite close. Until then I recommend you to get familiar with this kind of applications that offer access to various tv channels for free… Here is one:

December 10, 2007
Do you wanna be a student at MIT? Learn from the best teachers in the world? Read cool material, structured in an intuitive and comprehensive way? Now you have the opportunity to stay at home, enjoy your coffee, and watch great video lectures from top universities like MIT, Harvard, Princeton and Stanford. 
I have two resources for you guys, one of them is www.lecturefox.com/ and the other is http://freescienceonline.blogspot.com/ .
November 27, 2007