My friends at Rogue Amoeba have just released Airfoil 3.2.
'''This update improves our support for the new 802.11n AirPort Express, including full password support and better synchronization.
As well, Airfoil now supports remote control of iTunes or QuickTime Player when they’re being transmitted via Airfoil.'''
You can read more about it on their UTM.
I haven't plugged RA in a while, and now seemed like a good opportunity as ever; they make great software!