This information comes from an inside source that wished to remain anonymous...
"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."
Well, we already know that the Nintendo Network is in use on the 3DS, but is there more to be seen? Is this going to be the backbone of the Wii U and 3DS online support?