Android and windows 8 Bluetooth

Well here is my problem, I have seen the many awesome things on instructables that you use an app preloaded on an SD card to control an arduino through a Bluetooth module. But I might get the new windows 8 phones and I don't see any windows 8 phone projects. I would assume that I could easily connect to the Bluetooth module and but what about the app.? Does anyone know where I could possibly find a tutorial? 
Please help!