The versatile STOLMEN system at Ikea has always been a favorite. With all the different bits and pieces you can configure it to be a a room divider, closet, or entertainment unit. While visiting Ikea over the weekend I came across the STOLMEN system set up as a flat panel TV mount.
With the same industrial look poles and flexibility to add various drawers and cabinets to suit your space, this is another good option for getting the wall mounted TV look without having to deal with holes in your walls. Also, with all the space behind the mounting panel, you can easily run and organize the wires that have to run from your TV to the components below.
Price will ultimately depend on your cofniguration, so more detail is available at the Ikea website