Hi there,
I wrote a small BGT class, actually a small wrapper around the prowl app API. In short, it allows you to send iOS notifications. The readme explains this in more detail. I could think of this being useful if say, someone gets banned from your game and you'd like to be notified. You can get more info here.
http://github.com/cartertemm/prowl-bgt
If you have any questions, feel free to contact me.