As I have written earlier, I have joined the Foneros, the growing network of Wi-Fi (WLAN) users who are sharing their connections through Fon.com routers. And I also enjoy playing with my Wii. Bleak was the moment thus, when I realised that these two marvellous examples of the advances of wireless Internet and social services are incompatible. Yes: since a Fon router does not allow any network traffic before login/authentication, and as Wii does not register any Internet connection which it cannot use for direct access into its test server, it appears to be impossible to be both a Fonero and use it for Wii’s Internet connection. How sad. Or does anyone know of any workaround solutions out there?
frans goes blog 
I just hooked up the FON, chose the MyPlace connection on my wii, and used the sn as the wap pass and it worked perfectly…no other setup required.
Dustin, this sounds interesting, thanks for the tip. I must say that I do not remember all those settings at the moment in detail, so I am not sure about MyPlace connection… Have you written down in more detail how to do this somewhere?
Thanks I used the MyPlace connection nd it orked perfectly. The SN is ritten on the router itself. Thankyou again!