According to an uncomfirmed report sourced by
Verdicts.co.uk, Nintendo might be working on a wireless version of the nunchuck attachment for the Wii remote. The current model connects to the end of the wiimote via a short cord, which many gamers feel hampers gameplay. I mean, how can you flail your arms around in a mad gaming-induced frenzy with a wire hanging there? The wireless 'chuck could eliminate those problems, though it might open up a whole new can of Wii worms: synchronizing nunchucks with remotes. If Nintendo really is working on a wireless solution, hopefully it will be a seamless one that's just as easy as plugging in a cable.
Source: Verdicts