"amazing television 21st century style"4.5 starson by dondarko
Pros: Only 4 mins of commercials in one hour! Picture clarity and quality, chat features, ability to send your contacts on Joost your video playlist, on-demand video, movies and just plain old television.
Cons: Few bugs here and there for beta.
Summary: I've been a beta tester for almost a month now. Very satisfied with quality of programming with minimal intrusion of advertisers, since you only get 4 minutes of commercials in one hour. I guess it is TV European style (founders of Joost created Kazaa, FYI).
There is HD content, regular def, etc. All you need is a PC with a decent card (or media server) connected to your TV box with HDMI cable(preferably).
I also use it along with Vuze which is also free and has rental and buying options. CNet link: http://reviews.cnet.com/photo-video-services/vuze-by-azureus/4505-9242_7-32452915.html?tag=sub
Welcome to the 21st century, the way it was meant to be.