I agree with Dracaeon, a /where function is good because, noobs don't have a clue what the name of the map that they are on they would just say; "I am out in the wilderness, I see a tree and a rock infront of me, can you help me so I am no longer lost"
Maybe for privacy reasons, possible being able to use it only if they are in a group with you and/or you ask them, like trading?
I am guessing this would work like /who other than:
1) you need a name (/where Vakachehk, not just /where and it shows everyone)
2) instead of rank and guild information being next to the name, it will just have the map name.