For a little while now we've been working on a complete app example in Fuse to give you an idea of how to structure a complete app with custom native integrations. We decided to make a complete SoundCloud player using the free SoundCloud API.
We wrote a small article to go with it as well, please check it out: https://medium.com/@fusetools/i-made-a-cross-platform-soundcloud-player-with-fuse-9fb1e62b7db1#.y19gqvjvm
You can find the source code here: https://github.com/fusetools/fusecloud
I hope you all like it!