Still no word on a North American release.
Over 200,000 3DS owners have purchased at least one of the new games released as DLC in the StreetPass Mii Plaza.
This information was revealed by Iwata in a recent shareholders Q&A. He went on to emphasize that Nintendo "employed no mass-media advertising so we think we are off to a good start."
Such a positive response to the new games will hopefully mean that they will be coming to North America soon, although there has been no official word.