I recently got the Airport Express and was really looking forward to using Airtunes. A lot of times I want to connect my TiBook to my speakers but don't want to go through the hassle of getting the cables to use them. So I was hoping that I could play any type of sound through Airtunes. But I tried and it would only play iTunes music. So I was wondering is there a way to play any sound through Airtunes or is it exclusively for iTunes and also is there any third-party software that manipulates this sound-playing feature of Airtunes? Thanks