Joost, for the uninitiated is the latest project by Janus Friis and Niklas Zennström the wunderkind responsible for such disruptive technologies as Skype and Kazaa. It's a legal service to watch free television on your computer.
Joost is a new way of watching TV on the Internet. With Joost, you get all the things you love about TV, including a high-quality full-screen picture, hundreds of full-length shows and easy channel-flipping.
The Joost client worked well-enough for me although it's (obviously) bandwidth-intensive. It presents you with a full screen interface and a deep channel guide organized into categories. From there it's pretty simple, click on a channel and watch. It also features a number of social features like My Channels and Sharing.
The new beta features a redesigned UI that is more "Mac-like" with beautiful, translucent controls and widgets that exploit OS X. Joost for Mac also includes support for the Apple Remote. They've also added some new channels, including a games channel, a manga channel, a football channel, a Guinness World Records TV channel and more. Channels can take some time to load and previews some times don't ever load - but then again, that could be a bandwidth thing.
Media giant Viacom recently pulled its videos from YouTube and signed a partnership with Joost because it "is powered by a secure, efficient, piracy-proof Internet platform" that guarantees copyright protection.
Joost 0.9.1 for Mac OS X is still in private beta (although you can apply) and requires an Intel-based Mac running OS X 10.4 or later and a broadband Internet connection.
Some screen shots are in this gallery.