If both sides enter the friend code you can send messages to them. Also you will receive their Miis. They will show up in your Mii parade. If your Miis are set to mingle, your Miis will show up in their parade.
In a couple of months:
You will use the code to play games with your friends online, kinda like XBox Live.
If they allowed seperate codes per family member (ala PS3), then I'd put mine out. But since the kids play alot, I'll avoid that until Nintendo makes a way to have family members have different coded.
I'm adding all of you. I'll post my # tonight but you will get it when I add you anyway. I did a friend's number last night and it was active when I got up this morning. He was not in my Parade - no one is at this point.
Brief How-To ... just in case.
GOTO
Address Book
Add
Others or Wii
You want to add a Wii address
Then attach the Sat Guys Nickname that goes with the address.