Sorry it took so long, but procrastination — and possibly tryptophan — killed the bloggers. In case you can’t find it, go to the Wii message board, click Write Message, click on the icon that pops up on the right, and grab that number. Leave it down below or in this thread. Once you get over this small obstacle and have all your friends registered, you’ll be set for Mii parades, Mii travelling, Wii emails, and (it would seem) multiplayer in the future.
It’s still sort of a pain to do, and it takes a little while for the system to verify each friend’s registration, but it’s a one-off. Be thankful for that, post Thxgiving.