If you have wireless in your house, you just go into the Wii Settlings and enter the LAN information (thats how mine is connected too). Then you can send Miis back and forth, go on the shopping channel, the news channel, the Everybody Votes channel, weather, etc. And you can send messages back and forth to friends on their Wiis (as long as both of you enter each other's friend codes).
And of course then you can play Super Smash Bros. and Wii Mario Kart over the nintendo network.
