Well, they finally managed it at the University of Twente using the Awesome Powers of ... Duct Tape:
With duct tape covering one side of each vane, the vanes spun in one direction only. Since the beads lost more energy when they hit the soft duct-taped side than the non-taped side of the vanes, the machine generated a positive net movement.
Van der Meer noted that the machine doesn’t come close to violating the second law of thermodynamics, since the system is extremely inefficient. Most of the beads’ energy is lost through heat and sound.