I voted "No, LOL Wii"
Friend codes are awkward and painful to set up an online match. We managed to schedule a time for a friend halfway across the country to play Mario Kart Wii. It took forever and still didn't work right. Then once we got it set up, the game disconnected us about a third of the way in.
Nintendo is always several days late and more than a few dollars short. I hope the Wiii no longer takes a half assed approach to playing online but I'm sure they consider the friend codes to be a smash success and will continue them for the next generation.