This weekend I discovered Miro, an open source Internet tv and video player that can be installed on Linux . I have been looking for an application like this for a long time. I am now using it (instead of iTunes) to manage my video podcasts.
I first added TeXtra, Geekbrief, and TikiBar as "channels", and then I discovered a few more video podcasts using Miro's "Miro Guide". I now plan to watch Google's engEDU series which features presentations made at Google about various tech topics.
It seems like I'm starting to watch a lot more video on the Internet. I would much rather be sitting on my family room couch while watching these videos instead of being at my computer desk in the office. I think I'm soon going to need a solution that will let me play these videos on my TV - preferably a Linux-friendly solution.
 There is an Ubuntu repository from which you can install and update Miro. Click here for details.