Get the look: Seth says to shoot for wood-slat dimensions of ½ inch thick or so by 1½ to 3 inches wide. If you don't have reclaimed wood nearby, Viridian Wood Products will ship it (viridianwood.com).
DIY level: Not suitable unless you are handy with a saw. Hire a pro; serious tools are needed for cutting and installation.
Cost: Moderate (low materials cost, but labor can be $30/square foot).