When you are at the Wii Menu go down to the bottom left corner and click the button that says Wii Options when you put your hand over it. Then click the button that says Wii Settings. After click the arrow, and then click Internet. Then click Connection Settings, choose a connection to use. Click Wireless Connection then Search for an access point. It will say: Choose the access point you want to connect to. Click "Ok" and click the Wi-Fi connection you want to use. There you go.

thnx useful although i don't have wii!