How to Set up your own Mythbox
Luckily, a Mythbox won't get you into nearly as much trouble as Pandora's Box if opened and used. That's because Mythbox is an open source software that allows you to run Myth TV, which is a free way to turn your TV into a PC. You get a much larger interface as well as cool options like a video recorder and network streaming.
Best of all, you can build your own Mythbox on the cheap by checking out this video.