I have an Apple AirTunes module which I use to stream music over wifi in the house from iTunes. This week-end I installed a Windows application called "Airfoil" that allows you to send sound from any PC to the Airtunes modules even without using iTunes.

Then I thought : wouldn't it be great if I could redirect also my G1's sound to any choosen AirTunes module in the house ? It could be a sound file, sound from a movie, sound from a phone conversation, ...