An Update for those looking for more US content online.
Many of you may be aware of
Joost, Formally the Venice Project, the P2P Video distribution network. While most of the content available is not mainstream, there are a lo of gems, and the quality is quiet good.
A trick I've used a few times is to run
Hotspot shield or any other Proxy service and then launch
Joost. There is a TON of more content available for the US market (As usual) and so is worth checking out.