Sports Pack:
Further enhancing the realism of Wii™ sporting software, the Wii™ Sports Pack features three separate accessories: A Racing Grip, Golf Grip and Racket Grip, which each attach quickly and safely to the Wii™ Remote, transforming the game play experience. Designed to match the aesthetics of the Wii™ Remote, the Wii™ Sports Pack is a must for all sporting fans

Power Station:
The Wii™ Power Station features not one, but two high quality rechargeable Battery-Packs, designed for use in up to two Wii™ Remotes, removing the need for replacement batteries. When finished gaming, the Docking Station charges, stores and protects up to two Wii™ Remotes and provides a retractable cradle to store the Wii™ Nunchuk controller.

Controller Grip:
Get a grip with the Wii™ Controller Grip! Designed for use with software that requires holding the Wii™ Remote in a horizontal position, the Controller Grip attaches quickly and safely to the Wii™ Remote, adding a set of comfortable grips mimicking a traditional style game controller and offering comfortable, precision game play.
I can't see how this works with the Nunchuck, so kind of pointless.

Silicon Glove Pack:
Featuring two complete sets of Silicon Gloves for both the Wii™ Remote and Wii™ Nunchuk (One colored blue and one colored pink), the Silicon Glove Pack offers complete durability, protection and a secure grip for up to two players

These peripherals look good, however I think the sports pack is the only one worth investing. The price for these peripherals is still yet TBC.