[defdac]

First open source routers running Linux. Next disruptive innovation: Open Source Linux TVs?

[mtgx]

There's this:

http://www.ubuntu.com/devices/tv

And of course Google TV, but I don't think it will be open sourced until it moves to ICS (probably after this I/O).

[bradfa]

Sony's been running Linux on TVs for a decade, at least. They provide GPLed code here: https://products.sel.sony.com/opensource/