I've messed about with the control page device control icons "iTunesStatus_large+.png" et al, and I can't get them to follow Airfoil's device states. I've tried using "Source status is playing (True or false) and added "iTunesStatus_large+true.png" and "iTunesStatus_large+false.png" but that doesn't work. I've also tried using AirFoil's "Current Source Status" for the icon state and that doesn't work either.
How do you make this work on your control pages?