[Com013]

chat command: "setnick nickname".
That is enough, and that is already existing.
I'd like to have an option in the server list to check who is online on which player world before connecting to it. Like a button "Show players" which will open a player list. All you can do in this playerlist is opening the profiles. You cannot chat until you are logged on.
This way you could check whether there are Game Coordinators or some buddies of you online without having to wait until you are logged in.