If you're not familiar with Airfoil, it enables any audio to be sent to Apple's popular AirPort Express hardware, which is otherwise confined to a monogamous and monotonous relationship with iTunes. With Airfoil you can send audio from RealPlayer, Windows Media Player, and just about any other audio application to the AirPort Express.
So here it is, the Airfoil for Windows Public Beta. It's not completely done, but all of the features for the 1.0 are in place, and we're working to nail down any remaining bugs.
Please download Airfoil for Windows now, and report any issues directly to us. Otherwise, you can purchase Airfoil for Windows for $25 from the Buy Airfoil menu item right inside the application. Your license will be valid on the final Airfoil for Windows 1.0.
Tools and Utilities
1.0 public beta
Product page: here