OK, my wireless seems to work perfectly. I can connect to the Wii shop and download stuff, and I can download updates and do connection tests successfully.
I've added four friends, one of which is my own e-mail address. I'm sure that my friends have added me and that we have all entered the numbers correctly. However, they have not been registered successfully. Moreover, I never received an e-mail requesting a friend registration for my own e-mail address.
Do I need some ports open or something? I'm so confused. I don't know why that one particular feature would not be working. Has anyone else had this problem? Does anyone know the solution?