I thought about this while thinking about the concept of a launcher, and figured this would be a nice addition. Since there is obviously an in game phone, perhaps, as long as you are connected to the internet, you could message other players that you've registered in your contacts, perhaps swapping "numbers" or player IDs on the forums. This way you could text them in game without having to minimize the game and go back to the website; it would, basically, make it feel more immersive. Perhaps someone doesn't want this communication at a certain time. They could set their phone to silent or "do not disturb mode" so that they can't be bothered by texts. An anti-spam option would probably be a good idea as well. I personally have no idea how hard this would be to code, whether servers would have to be set up or if it could be done quickly and simply. I figured it was worth mentioning, it would be awesome if it could be implemented.