Anonymous, coordinates have now been in the official, vanilla game for some time. Look under the settings for a particular game, and you should see coordinates. You'll have to toggle it on and then when you next load that game, coordinates will appear on your screen.
why do we need this now? there is an option in the 'edit world' menu to turn them on in game without this addon!
Although, if you are playing pre- 1.2.0, then this is recommended until you can update to 1.2.0+
Although, if you are playing pre- 1.2.0, then this is recommended until you can update to 1.2.0+