We still do not know exactly what the Nintendo Network is all about. If you look close enough you will realize that Mario Kart 7 uses Nintendo Network. What other things will Nintendo network offer? I guess we could consider these rumors.

“A source that wished to remain anonymous has told us that Nintendo will launch a website accessible from any web browser that will handle configuration of your Nintendo Network account for use on the Wii U or 3DS. He also stated that Nintendo Network will include many new features that haven’t been used before by Nintendo. According to his accounts: Nintendo Network = Sony PSN = Xbox Live.”