Downloadable 3DS game updates are available now.
http://www.nintendoworldreport.com/news/28878
Updates to a number of eShop titles are now available. It is not clear what has been changed, so the updates are likely bug fixes.
Updates to a number of 3DS Download titles including 3D Classics: Kirby's Adventure, Pushmo, Freakyforms, and Netflix are now available on the eShop. Several Virtual Console titles have also been updated, including Super Mario Land 1 and 2, Kirby's Dream Land, and Link's Awakening DX.
Oddly, going into Updates under Settings in the eShop yields the message, "There are no updates available for any of your titles." However, an update button appears next to each relevant title under the Your Downloads section of the eShop. Updates can be downloaded immediately or queued like any other downloadable title.