Suppose a person were two boxing a toon with mining and a toon with herbing... are there any addons (or would it even be possible) to show things seen by one character on the other characters minimap?

Failing that, even just the follow character whispering to the main "I see a lichbloom" would work.

At the moment I'm simply running with the second toons minimap blown up 4x the size and in the near corner of the monitor to the main, but clearly this is an inelegant solution.