For three years, I just had a queen size Hobbs 80/20 batting tacked to the wall. It worked, but would pull down when I had a full quilt layout on it, and the bottom kind of puddled on the floor (and had several too-close calls with the vacuum cleaner!)
When we moved here, I have one room with a 9' ceiling - which I immediately claimed for my sewing room :D DH helped me put together 2 4' x 8' design walls; a frame, foam insulation, a layer of muslin and a layer of the Hobbs 80/20 batting. He put hangers on the back of each panel, so each is held up on its own with only 2 screws in the wall. I didn't want to attach it permanently, because inevitably what goes up must come down :wink:
Here's the post with a picture:
http://www.quiltingboard.com/posts/list/21991.page
It's been up 2 months now, and I'm still lovin' it!