Mind Vision can be enormously powerful in Warsong Gulch, as the flag carrier can easily be targeted via /target <name> and then function as the target for the spell.
When defending a node in Arathi Basin priests can Mind Vision an incoming rogue or druid before they stealth, then pop them out with [Shadow Word: Pain] once they come into range.
It can be used to annoy other people, as it cannot be dispelled, except by invulnerabilities such as Divine Shield or Ice Block.
As a consequence of this skill remaining 'glitched' (insta-cast spells work on your target while channeling Mind Vision) it is possible to chain-cast Mind Vision between multiple mobs/players. Useful for maintaining the watch on the flag in Warsong Gulch, or third-person scouting in raid/dungeon encounters.
Combined with the Warlock's Eye of Kilrogg or the Hunter's Eagle Eye, this can prove useful for allowing multiple players to scout the same region.
Using /target to target a known PvP player nearby, then use mind vision to determine exactly where they are.
When trying to find a certain mob character for a quest, use /target to target them and then mind vision to locate them. When you leave mind vision a small dot appears on your mini-map for a second showing you where he/she is.
If your target does not target anyone, this spell causes them to automatically target you.