If you don't want to buy a new Wii or Wiimote just for one of these, then you can get up to four free from Nintendo. North American customers can order them online or call 1-866-431-8367; Japanese customers fill out the form here; and Australian Wii owners call (03) 9730 9822. We're sure there will be an option for Europe as well, but Nintendo of Europe has yet to provide the information.
This news comes just three days before the release date of the NERF Wiimote sleeve. That's a shame. A shame that results in big savings for you!