Boxee
boxee.tv
It might not replace your cable, but it definitely looks very well thought-out, especially the social-networking aspects. (Unfortunately, it's only for Apple and Linux users.)
The NY Times profiles software that provides a well-organized interface for accessing multiple internet multimedia and music sites on your television.
boxee.tv
It might not replace your cable, but it definitely looks very well thought-out, especially the social-networking aspects. (Unfortunately, it's only for Apple and Linux users.)