As of my last update, the population of Nintendo Network Service Development is not publicly available. The team at Nintendo working on the network services comprises a diverse group of engineers, developers, and support staff.

Nintendo Network Service Development was created on 2003-09-30.

In simple terms, yes it is

no

TNN stands for The Nashville Network which became The National Network. TNN can also stand for The Nintendo Network, The Navajo Nation, and Travel Nurse Network.