Edit: That title typo...
With the introduction to multiple servers I think it would be good to add a cross-server messaging system so we can talk to friends on other servers.
Some suggestions for the friends list:
- Display a friends world
- Display online, offline or busy (player set's to busy)
- Display what area the player is in
- Display the players level
- Have the option to "Hide yourself" so you can appear offline
- Have the option to hide your level, area, or world.
- Have the option to display no statistics to players if they're not added on your friends list, including if you're online or offline. (So basically a confirmation of a friends request, but without the message spam).

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