AirFoil 3.0

We give the floor to Remy:

Rogue Amoeba yesterday released since AirFoil 3.0
This tool is a must-have for any Macuser (or even Windows User, as a Windows version will follow) who uses Airport Express terminal (s) connected to a stereo to broadcast the audio of any application running on the computer.
The main developments of the tool over previous versions are really cool:
1 - now the sound of the selected application can be distributed not only via Airtunes to a stereo connected to an AirportExpress terminal, but also on any Mac with an Airport card in real time , when you install a small application that comes with AirFoil 3 (and start it). The Mac source of course can also be the target of the audio distribution.
2 - AirFoil now includes a video player capable of playing not only any video on the Mac, but also a DVDVideo, disseminating synchronised audio/image via AirTunes.

MacOS X really lacks such a tool for using AirTunes because neither iTunes (video clips do not broadcast the audio via AirTunes), nor DVD Player, nor FrontRow use AirTunes to distribute the sound of videos (probably Apple did not want to bother with synching sound / image)
However, it appears that under Leopard, AirFoil cannot "hijack" the new FrontRow that remains totally non "Airtunable", included for audio dissemination when accessing the iTunes library ....

For additional information: http://www.rogueamoeba.com/airfoil/mac/
The software costs $ 25, while the upgrade from version 2.0 costs $ 10

update from iop:
In Airfoil, set System Audio as output, launch Frontrow and it will work. However it seems that you can't use the volume buttons of the remote.