The local sharing happens through a simple JSON/HTTP protocol (still to be documented, you can look at how it works on the code for now, very very simple)
We'll put the specs of this protocol out for you to implement clients in your favorite platform, this way you will be able to browse, stream media or download files that FrostWire for Android users have decided to share on the local network.
FrostWire for Android also features a simple media player that we'll be evolving with future releases.