Raid leaders might appreciate this, you know that little right click thing you can do to assign teams Red team, Blue team; why not add two or three more colors, and then heres the funny part, make it work in a raid instance instead of running around outside so people can just click and say red go there, blue go there, yellow over there, and green over here?
Might make it a little easier for people to look and say, "Hey, I'm not with my team!" or "Oh look that red bar is dropping really fast, I should throw him a heal <xxxx is out of range> (then theres a ding to the left), darnit man, sorry you got whacked I was trying to heal x name here, forgot he wasn't close to us."
Anyway, just a thought.