What are some cheaper alternatives to Airport Express that allow music streaming? I have a Windows desktop and laptop (no Macs) and an Airport Express for listening to music in the living room. I also have sets of speakers in two other rooms. I don't want to spend another $200 just to redirect sound to other rooms. 

Is there a cheaper alternative to Airport Express that would allow me to stream music from iTunes (on a Windows computer) to these distant speakers?

(I intend to control the music playlist/volume remotely via a mobile device)
Unfortunately, there aren't any products other than the Airport Express that are compatible with iTunes music streaming (unless something new has come out recently). However, it's usually very easy to find a used model online for much less; I was able to pick up two of them on Craigslist for about $30 apiece. They may not be the latest model, but if all you're interested in is streaming music, then any model will work just fine.