I see spotify have now released an a web api allowing control of players!
It also allows device discovery, whats playing etc.
Now my initial thought is that this would be an amazing binding, but I saw a few messages previously recommending people just use the http bindings rather than creating API specific bindings which I totally understand, but this does somewhat increase the barrier to entry for a lot of users.
Perhaps it would be useful to have a wiki somewhere that people can contribute http based bindings (e.g. rules/items etc that have been added to support the api).
Or maybe this already exists!