It's like a buddy list of other people's Wiis. It lets you exchange messages and Miis (little cartoon characters you create). It also lets the Miis travel to other peoples machines (if you have it set up that way). There's no fee for this but you do have to purchase legacy games through the Wii Store (NES, SNES, SEGA, etc.) The Wii has wifi built in so if you have a wireless network in your home, set-up is a cinch.
BTW, all you people are still greyed out so when you get a chance please add me to your Wii.
