The closet I got to something that you are looking for is using Orb 2.0 and Pocket Player with the Orb plugin. In order for me to be able to access my files that orb had outside of my local network, I had to set up a VPN server using OpenVPN.
Here is the thread:
http://ppcgeeks.com/getting-the-6700...659.html#44291
And here is a picture (more in the thread):
I do hope that the plugin can be improved so that setting up a VPN server would not be required. It was a bit of a pain... plus pre-buffering/caching other tracks would be nice.