Fast Forward has pulled off sale and destroyed its remaining inventory of four products that contained material owned by Wizards of the Coast and not available for license under the Open Gaming License and the d20 System License.  According to an announcement on the Fast Forward Website, Enchanted Locations:  Crypts and Tombs; Dungeon World; Dungeon World:  Secrets of the Enemy Capital; and Rings of Power all contain material that is not Open Content.  Fast Forward specifically avowed in the statement that none of the use of that material 'is a challenge to copyright or trademark status.'