It would be AWESOME, if you have sth like "real-distance talking".. you know, walking around and, when getting closer to someone, you can start to hear them... then walking away their chat audio fades out. like in real life: 100m distance to someone: can't hear him. standing, 10m away you can start hearing them without inviting them. i think this is possible, at least i really hope that this is possible.
(Sorry for my bad english)