I just got the Connecting Threads catalog and they have Fons & Porter's design wall on sale. It is flannel with brass grommets that can be used to hang it up. It is 5' by 6' and is on sale for $20.
You might look at it to get ideas or see if this is what you want. I imagine it would work well if you need something that could come down and be moved easily.
Just thought you might check it out... :-D
Oh, they have books on sale, too!