This simple Wiimote hack reminds me of the days when the NES Advantage allowed for a little "turbo" fire while playing a Shmup like Life Force. It was kind of cheating, sure, but it made old games fun again. This kit does the same. I may rent House of the Dead 3 for my Wii now. Emphasis on "may."
As you can see, the hack adds a little flair to the Wiimote too: