Yesterday I did it a small lecture about multimedia centers on GNU/Linux. Me and my gang (GLUTAD-USERS) choose to demonstatre Linux MCE.
a free and open source software platform designed to allow a computer to act as an HTPC (Home Theater PC), personal video recorder, and home automation system. It allows control of everything in the home, from lighting and climate to surveillance cameras and home security. It even includes a full-featured phone system with video conferencing.