I have 4 invites to give away for the Joost beta. IM me with your email address you want the invite sent to. I am out of invites. If anyone else is feeling generous, you can give them away in this thread.
Joost is from the makers of Skype. It is a peer to peer, streaming internet TV system, and you can watch whichever shows you want on demand. It is actually legal, and they have licensed content from National Geographic, Comedy Central, and other distributors.
During the beta, there are no commercials. It currently runs on Windows and OS X Intel. A Linux version is planned.