If you go to the Polk forum at the link below. I just finished a new a/v stand that shows my built-in media shelves. For a better look click on the link in one of the post that says "My Theater Room". They were built out of 3/4" white pine. The pictures are on the second page about mid way down.
http://www.polkaudio.com/forums/showthread.php?t=49845