Wii LAN Adapter
The Nintendo Wii LAN adapter allows users to connect their Wii to the Internet using a standard Ethernet cable. The adapter is useful for those who are not near a Wi-Fi hub or have a sluggish Wi-Fi connection.
Wii Speak
The Nintendo Wii Speak allows users to voice chat over the Internet in supported games and in the Wii Speak channel. It is designed to filter game noise and allow an entire room to chat on the same microphone.
Keyboards
Any USB keyboard can be plugged into the Wii's USB ports to allow users to type messages or website URLs using the Wii's Internet channel.
Wii Fan Stand
The Wii fan stand is a USB-powered cooling station sold by GameStop. The fan stand is supposed to extend the life of heat-sensitive components inside the Wii.
Charging USB Devices
The Wii can be used to charge MP3 players, phones and other devices that have a USB connector.
Wii Charging Station
Mad Catz manufactures rechargeable Wii Remote batteries that can be charged in a station that plugs into a USB port.