Recent pictures around the internet have shown speculations surrounding the mysterious Nintendo Network. Not much was revealed at last year's E3, but according to this box art (seen below) of the upcoming Final Fantasy: TheAtRhythm, the top right hand corner shows a "Nintendo Network" logo. 

Perhaps this is their equivalent to Xbox Live or the PSN, because the online capabilities of the 3DS are quite useful and not too ancient looking (much like the Wii's poor excuse of an online service.)

I'm going to assume that this "Nintendo Network" will be revealed at E3, along with all the other speculations and rumors we've heard as of late.