There was supposed to be a sizable patch coming for the Nintendo 3DS sometime in November. Instead, it’s going to be released on December 8, which according to this calendar I found is not in November at all.
The update will make it possible to transfer data from one 3DS to another. StreetPass will be getting an update as well that will provide a map to for all the Miis you meet. There’s also supposed to be the addition of the 3D camera coming, which will allow for up to 10 minute of 3D video and will also make available stop motion photography, which sounds awesome.