I think it would be nice when viewing the big map (or even minimap), that it somehow displayes the current coordinates your mouse is at on the map.
For example lets say I mouse over Aqua, either in a tooltip or somewhere it then shows "Aqua (52, 162)".
Something really neat would be if it was "live" meaning instead of waiting for a tooltip, you have your mouse, and then somewhere on the map it shows the current coordinates, and as soon as you move your mouse the coords then instantly change, so you could move your mouse across the map and the coordinates would change with the mouse movement instantly.
The only problem I can see with this is if you're zoomed way out, this would really only work if you're zoomed medium or far in. Unless theres someway to make it far zoomed too, but I'd think that'd be a bit weird.
While not a real practicle or usefull feature it would be interisting to have and see where things are better than guessing and having to have a Landmark.