This is the new venture from the founders of Kazaa and Skype. They are now launching a new peer-to-peer TV service. The vision (copied from the front page on their site):
"to bring you TV wherever and whenever you want it, free of the restrictions of schedules and subscriptions"The claim is that Joost will deliver "It's full-screen, broadcast quality TV, with instant channel flipping and interactivity".
If you need more, here are a few links to blogs / new articles: