Create a new building that costs 1 bp, has low health (25 hp) and is small and inconspicuous. It would create a small camera that could be remotely accessed by the team, taking in a 3d view of the surroundings. It would be accessible from a menu or using commands, and would display the scene from the direction that the player was looking in (eg,. if I was looking north, the camera would display what it saw looking north). It would also show up on radar/whatever aliens use as a green dot. It would not show up on enemy radar.
I can see several uses for this:
Instead of screaming "BUILDING IN PLANT ROOM" and then repeat that a couple times, I could place a camera and say "BUILDING AT NAV 23." This would also help with maps that do not have room names, or for ambiguous places (Like the middle of the stairway in Niveus, which could mean in the stairwell, or in the other room inside).
If you placed it well enough, you could stick it by entrances, and be warned in advanced of rushes. This could encourage not camping, since you would know when the enemy was attacking.
Placing one in your base (Maybe one could always be on the OM or RC), and go out and rush. You could tell when the base was under attack and return. This would discourage camping since you could rush in safety.
The downside to the camera is its low health. Only a few hits (and less than 1 with bigger weapons/classes) would be required to kill it. It should also have a slow build time (10 seconds). The dretch should also be able to attack this building.