[Pickalittle]

I play lead in a large church. Our usual band includes piano, keyboard, bass, drums, percussion and back-up vocals. Often I'm the only guitarist so get to play a wide range of sounds and it stands out.
This weekend our worship leader (from piano) will be sharing with a touring CCM leader on guitar.
My quesion is, for those of you who play with multiple guitars, how do split up the playing so you are not stepping on each other? How do you keep from muddying up the subtle (and pretty, emotional) things being played by the acoustic or lead or even rhythm without playing over each other.
Though I'm a lead, I also play chunky rhythm or subtle clean, so what do we do with the other electric? we don't have stricked assignments (I'll play lead only, you play rhythm).
The set this weekend is more reflective and less rocky.
Just interested in how you guys like to work it.