We're currently working with a company called Lada Cube (www.ladacube.com) to build out retail space for a project in Aspen, CO.  Lada Cube makes a wall system they call DIPS or demountable insulated panels.  FYI, their website doesn't do their product justice.

These walls have internal mechanical cam-locks, which allow for quick assembly and have great holding power (750 lbs per cam).  We also chose their optional biomass fiberboard exterior, which they say is made from recycled cardboard & paper waste agricultural fiber (apparently through a grant with the U.S. Forest Service).  They also have samples using banana peel waste and mango peel waste!  From our experience this material is strong but also about 1/3rd the weight of conventional materials we've used in the past.

Thus far we really like the Lada Cube system because it is allowing our client the flexibility to modify their space as needs present and or move their walls to a new location should they decide to.  We also like that we can complete our build out in a fraction of the time thus no costly delays and we did t have to pull any costly permits as Lada Cube is considered "equipment."  Additional, the Lada Cube walls we're using are incredibly "life like" in that they feel and function like a real wall.  In preparation for the final build out, we have assembled a Lada Cube dressing room, which went together in 5 minutes.  We have been very impressed so far.

We believe that Lada Cube is a product worth exploring with many benefits for interior and possibly exterior build outs were flexibility and maintaining assets are valued.  You can see more photos of our project's progress, which Lada Cube has been posting on their Facebook page (https://www.facebook.com/ladacube).