I have often thought it would be interesting to make a screen with no black border. Then mount it in front of black drapes or a flat black painted wall. That way the image would appear to be floating in mid air. Then someone started a
"Floating" BOC Screen thread over on AVS that demonstrates the idea. I thought the folks here might find this an interesting way to implement a screen. Here are a couple of photos:


Mounting Brackets:

Of course this approach could be used with any type of DIY screen substrate. For example a similar frame with 1/8" white hardboard attached to the front, with or without paint. I would paint the edges of the screen flat black or apply some black cloth hockey tape to the edge.