The Nintendo 3DS allows you to send messages to people on your friend list !

On the Nintendo 3DS you will be able to recive messages from friends. It's kinda like Picto Chat but it is wireless and you will not have to be nearby the person you are messeging. You’ll be able to send messages back and forth to your friends as well. When your 3DS receives a message in sleep mode, the Notification LED lights up in green and when also in the middle of a game . Additionally, the Notifications icon in the Home menu will change when you’ve received a new message.”