Built it as a project over a year ago:

Mini ITX board: 250 GB drive. Windows xp professional with Meedio for a “front end”. Use a 8 inch touch screen for interface. Currently holds around 20 of the kids movies as well as our entire music collection (around 1,000 albums). Plays through the TV of course. I do not use it as a receiver for TV and do not use it as a PVR. Could easily do so by adding a TV card though.

The box is made by Morex and is only a bit bigger than a text book. Virtually silent, looks like the rest of my system and we no longer have all those cd’s in the way.