Stream audio using Airplay to Android Phone

While searching for a way to stream music from my Android phone to an Airplay server I found an Android app that does the opposite.ย 
I tried It and it really works. At least until the phone goes to sleep…

Stream audio using Airplay to Android phone withย vavi-apps-shairport:
http://code.google.com/p/vavi-apps-shairport/
If anyone find out a way of doing the opposite please let me know.
That is tapping into the audio-system of the Android and sending all audio to an Airplay server. Like Airport Express or Apple TV or the shairport software that I use.