The more I think about it, the more I really believe this news is true. Nintendo has expressed reservations about going online, and RIGHTLY SO, in my opinion. Think about it: can a 9 year old sign up for a credit card to get on XBL? Nintendo's younger market that drives their sales simply can't take advantage of the traditional online model.
THIS, on the other hand... it literally solves all their problems with online gaming. Its FREE, because the systems create, maintain, and relay that signal themselves. Doesn't cost Nintendo anything. It doesn't even REQUIRE an internet signal. No need to have an ethernet cable or even be in a wireless hotspot.
Imagine being in the woods, and if there's enough N21's near you you can go online with your DS. If every nintendo system from here on out uses this protocol Nintendo would have their own gaming network running, entirely separate from the "internet." Every hone with one of these systems sending a signal is then a "Nintendo home" and helps to strengthen that signal.
I think that if you live in a rural area a traditional internet signal could augment the service, to allow you to play others, perhaps.