Warp Whistle is reporting sans source link to GoNext that the above image is the first third-party Wii nunchcuck controller, and it’s black to boot. Rather than analog, however, the unit features a d-pad to control. From the article: “Game peripheral maker Big Ben is making a Wii Nunchuk Controller, with an on/off switch because it either has rumble or it is wireless.”
You lost me at the “on/off switch because it either has rumble or wireless” part, but expect to start seeing these (or other third-party accessories) soon. You’ll only see official Wiimotes in my house, though, being the Ninty purist that I am.