Before you ask yes this is Flipnote Studio 3D for the 3DS and No it not officially out yet.
How did I get it? I got it form Club Nintendo if you haven't heard Nintendo is closing down Club Nintendo in favor for a new point and reward system to be announce later this year. so as a special "thank you for being a member" gift they gave out codes to download Flipnote Studio 3D to all Club Nintendo Members wish I happen to be one.
hopefully this means that the app will be coming out for everyone soon I don't really know they haven't anything more on it.
anyway I this is something I quickly made when I was trying it out.