I have spent some time playing around though, and there are a few things that the rest of us can look at - lots of TED material, 57 'Meet the Author' interviews which were enjoyable, material from the History Channel, several university based videos and so on. Sure, most of this stuff is available from source, but Clicker is doing a good job of pulling it together. My main criticism is that, given the US/Rest of the World divide, it would be helpful if they could introduce a method of screening so that I don't have to go all through the video player launching before getting the 'nyah, nyah, you can't watch this!' message.
Clicker is in closed beta at the moment, prior to a full launch, but if you're interested I have been given 5 invites to give out. Just go to http://www.clicker.com/invite/
You'll be able to create an account there and then. Be quick though, because after all 5 invites are gone that's it, and I don't have any more available.