Rogue Amoeba Software's Airfoil 2.0 fills some major gaps left by Apple's AirTunes software for broadcasting music to the Airport Express base station. The original Airfoil enabled any audio (not just iTunes) to be sent to the device. Airfoil 2 makes it possible to send audio to multiple AirPort Express units simultaneously and in sync.

Using Airfoil and multiple AirPort Express units, it's possible to "wire" a house for audio, wirelessly, for a fraction of the cost of more expensive audio players. To add audio to a room, just plug in an AirPort Express (and speakers, of course), and Airfoil can send the audio there. Heck, not even iTunes can do that, but Airfoil will work with iTunes!

New Features In Airfoil 2:

* Support For Multiple AirPort Express Units
* Support for sending audio to password-protected units
* Audio Effects, including a 10 band equalizer, as well as volume and
balance controls
* Support for sending audio to password-protected units
* Send audio from new sources, including USB radios, Dashboard widgets,
and audio devices
* Send all audio playing on the system
* Support for sending audio to password-protected units
* Includes and supports Smart Crash Reporting
* Fully Applescriptable

Airfoil 2 is immediately available as a free demo from the Airfoil Web site. Version 2 is a free update for licensed users, new users can purchase Airfoil through the Rogue Amoeba store for US$25.