Rogue Amoeba released version 2.0 of Airfoil, one of my absolute essential mac applications. If you own an Airport Express, and are less than impressed by iTunes’ transmitting capabilities, plunk down $25 now.

The first version of Airfoil let you transmit audio from any application, but this new version has some great new features:

• Support For Multiple AirPort Express Units - Send audio to multiple units

• Audio Effects - New effects built into Airfoil allow for enhancing audio with a 10 band equalizer, volume adjustment including volume overdrive and balance controls

• Full Applescriptability - Control Airfoil with AppleScripts

And, to top it off, the UI has been much simplified. Nice job!