Friend Codes, I've Searched, Still Confused!

[CaliforniaBeachUSA]

I have had a Nintendo DS ever since it came out and I have used Friend Codes for the longest time. But I am still confused about friend codes with the Wii. How exactly does it work with the Wii & what about the games I've been playing? I haven't seen any online play in them such as "Wii Sports, Zelda, & Trauma Center". Maybe they are all just one player?

 

[pizzaluvr]

you can only send messages now, but online play will be available in Q1'07

 

[CaliforniaBeachUSA]

Ah I see. And what about privacy? It's not like your social, haha. So is it ok to have your friend code in your signature? Eh are you able to block some one if you get problems with them?