Social Software for Set-Top boxes...

"Imagine a buddy-list on your television that you could bring onto your screen with the merest tap of a 'friends' key on your remote control. [...] The interface that would let you add and remove friends, and see what your friends are watching in real-time - whether they be watching live television or something stored on their PVRs. Adding friends would be simple - you could enter letters on screen using your remote, or browse your existing friends' contact lists."

URL : http://www.plasticbag.org/archives/2005/03/social_software_for_settop_boxes.shtml