I like this idea but just a thought... If you had bad or drunk dart throwers and they kept hitting the corks would the corks eventually like chip away and look bad? I mean I guess you could probably just adhere another one in its place if that happens.
Cork Baseboards - Glue corks side by side onto a base of 1/4-inch MDF and cut along the long ends with a saw to an even height. Attach strips of 3/4-inch molding to the top and bottom, and nail the strip of corks to the base of your walls.