Nintendo has released a new update for 3DS that introduces Miiverse support, as well as strengthening the link between the handheld and Wii U by allowing players to tie their Wii U Nintendo ID to their 3DS.
That means players will be able to send content between the two devices more easily (such as sketches), as well as share digital currency.
Here's a list of features coming in the 7.0.0-13U update (via handheld's Wiki page), and more information can be found on Nintendo.com.
Added Support for Nintendo Network IDs
Users can now create or link a Nintendo Network ID, which is required to use some network services, from within System Settings
Nintendo eShop has been updated to support Nintendo Network IDs (*1)
For more information regarding Nintendo Network IDs, please visit our Nintendo Network ID introduction page
Added Support for Miiverse
Users can now view and post to Miiverse from Nintendo 3DS family systems
For more information regarding Miiverse, please visit our Miiverse introduction page
Added a Software Update Notification
A notification will now display when software is started and update data is available (*2)
Removed the limit to system transfers
The previous limit of five system transfers per system has been removed
Changed the start-up method of Nintendo 3DS Camera from the HOME Menu
Pressing the L and R Buttons simultaneously will now start the Nintendo 3DS Camera from the HOME Menu
Improved system stability and usability
Further improvements to overall system stability and other minor adjustments have been made to enhance the user experience
1 - Credit card information stored on the Nintendo eShop will be deleted after this update is performed or after linking a new Nintendo Network ID
2 - SpotPass must be enabled to use this feature.