So, I just bought my first HDTV and soon I'll be making a built-in shelving unit to surround it (from wall to wall in the room). I've been playing with the idea of having something in front of the TV to hide it when not in use, but commercial solutions are hideously expensive ($1000 - $15000).

I'm thinking something like a piece of art, photograph or mirror. Framed or unframed.

I'd really like to make my own solution. Has anyone done anything like this before? Or, has anyone got any commercial product that doesn't cost an arm and a leg?