I found this interesting, though a little bit pricier than the other chargers and packs (I have the Nyko myself). It can charge with the jackets on the Wii remote as well, and is the first Nintendo licensed charger.
From the Sanyo website:
Tokyo, July 24, 2008 ---- SANYO Electric Co., Ltd. (SANYO) announces an easy-to-use ‘Contactless Charger Set for the Wii Remote Control’, produced especially for Nintendo Co., Ltd. (Nintendo)’s Wii remote control.
The Wii remote uses two AA batteries and it is well known to take up many batteries. This new set offers users the convenience of simple charging by placing the Wii remote control into the specialized stand, the only battery and charger made under license*1 from Nintendo, and the capability to sequentially charge 4 controllers from a single AC adapter. The charger also offers a ‘charge failure detection function*2, ensuring safe recharging. Easy enough for even the youngest or oldest of Wii players, the Wii remote control can be recharged by simply placed in the stand without removing the batteries, the Wii remote jacket, or the back cover.
SANYO’s battery pack and charger, the ‘Contactless Charger Set for the Wii Remote Control’, will be on sale in Japan starting from August 25, 2008.
More information on the site:
http://www.sanyo.com/news/2008/07/24-1en.html
Edit: Here is where I first read about it, includes a little more info and pricing.
http://www.pcworld.com/businesscente...r_wiimote.html