If you're reading this you may be interested in Wiimmfi [1], which is a re-implementation of the Nintendo Wi-Fi Connection (WFC) online gaming service that discontinued on May 20th, 2014. It was the online service used to play games like Mario Kart DS online.
Wiimmfi is similar to Xbox Live Project Insignia [2], and to a much lesser extent XLink Kai tunneling for local System Link over the internet. What a wonderful age we live in!