PBS has a variety of great shows available for free online. These shows are all high quality intelligent TV that you've come to expect from PBS. Below is a forthcoming documentary that will be available on PBS.
Crackle is an ad supported movie and TV site. They have a fairly good selection of movie and TV shows and best of all... it's free! Currently they're showing one of my all time favorites, The Karate Kid!
3. Major League Baseball - MLB
If you're a sports fan like me, it's hard to cut the cable cord. MLB helps to take the sting out of not viewing most of the games by providing video highlights of EVERY game. Also, they live stream one game every day.
4. Yahoo Screen
Yahoo offers a nice variety of online content including original shows, full episodes of TV shows, News, Living, Comedy, etc. Below is an example of Yahoo's! original entertainment show OMG!
For the gamer, the #1 review site on the web is IGN. They do detailed video reviews of video games, movies, TV, and comics. If video games are your thing, I highly recommend you visit IGN before purchasing your next game on any system.