This idea stemmed from something I found in an industrial design catalog. It wasn't the furniture for sale that caught my eye, but rather the wall treatment in the background. They had used rough hewn lumber mounted over a concrete wall. Since I didn't want to redo the entire wall in my rental, I felt something more mobile would be appropriate.
Step 1: Lumber
For the trusty, reliable (and free) reclaimed lumber I nabbed a pallet headed for the garbage. Make sure to remove all the nails. I tend to get immersed in my work, so I forgot to take additional photos, but I used a table saw to cut pieces to a consistent size and a planar to smooth things out. For this particular project, an orbital sander should work fine.