I use API emulator with PuppetMaster ( http://www.lim.com.au/PuppetMaster/
And have some errors for you:
1) Volume control don't work (showing and changing)
2) Playlist discovery don't work too
Please fix it if you can - it will be very useful for me and others.
Also you can contact me by ICQ (#55-972-695) for I help you to test or send some dump of API requests (if you give me some tool for dump it).
10x for plugin