Miro, formerly known as Democracy TV, made its first public release a few days ago. It’s available at http://www.getmiro.com/. Miro is like a blog aggregator for video sources such as YouTube and Google Video, as well as provider content such as various news and science tv channels, The Onion.
Installing it was trivial under Ubuntu, although it conflicts with the blackdown JRE. You can install the sun jre instead to get around this.