Unfortunately, until they change the firmware/software bluetooth headsets won't work with the pi :-( One guy did some very heroic investigation/programmng/trials. Bluetooth out OK bluetooth in nope... however it works with just about any usb headset. Or bluetooth with a dedicated dongle like the logitech H800 .. the difference is that the dongle presents itself as a usb device, and the bluetooth stuff is all handled pre pi in the dongle itself. Like your cordless mouse. I also can't get bluetooth wireless headsets to work with the mumble app on the phone... which was a real bummer as well.