Nyko announced a charging station for Wii remotes. I was relieved to hear that the charger works with your existing remotes replacing both the batteries and the battery covers. The new battery cover even has a rubberized grip. Each station supports two remotes.
Compared to using normal AA rechargeable batteries, you don't have to take the batteries in and out every time you recharge. You just dock your remotes when you're finished playing, no muss, no fuss.
Unfortunately, the station doesn't appear to come with or even support wireless nunchucks. I'm just going off the pictures though.