Google Play Music supports this. Upload your audio files; stream from anywhere. No subscription needed.
I don't want to have to upload a huge library of music just to stream it to my local network, where I already have the music on my hard drive.
But I've always wondered about this argument - Why wouldn't you put your local music library on Google music? It's free and means you've got access to your library everywhere. I could understand before they had matching that uploading 100+GB of music is probably not desirable, but it now even big libraries are fully uploaded in a day or so.