I've noticed that when playing osu I want to see when my mutual friends come online. The problem is, is that you can only see when your friends are online when you are on the osu client as well and you see when people come online and offline in the bottom right hand corner via a small notification. So instead of having to have osu open all the time, why not have an option in the online tab where you can have desktop notifications enabled for osu when mutual friends come online and also for text messages. It would be good toggleable so we don't have notifications all the time.