No word on when NA will receive the Mii Plaza games.
http://www.nintendoworldreport.com/news/34707
Nintendo has released system software version 6.0 worldwide, giving North American 3DS owners access to save data backup and new features for the 3DS camera app.
The save data backup feature allows users to backup save data for download titles to the SD card. The utility can be found in the System Settings, and allows users to backup one title at a time, for up to 30 titles.
Some of the software that are unable to be backed up:
In addition to these, all ten of the Game Boy Advance Ambassador games are also unable to be backed up.
The camera app now features various filters and manual focus, as well as the ability to manually adjust various settings such as contrast and saturation.
3DS owners in European and Japanese territories have also received additional games and features in the Mii Plaza; check out our coverage here.
I do believe that the Mii Plaza additions were cut from the NA build due to bugs currently crashing the Europe and Japan Mii Plazas.yeah most likely
I'm a bit upset because Animal Crossing is the save I would want to backup the most and it doesn't work.