For anyone with a Galaxy S3 or other phone that uses the 11 MHL pin spec. I found an adapter cable from MonoPrice PID 10019, this will fit on your phone with a case on vs getting the Samsung MHL adapter which may not fit on most phone cases, its also about half the price.
I got mine yesterday and it worked with my X950BH. I've only had about 20 minutes to play around with the app radio but it appeared that when I hooked it up and I got the appradio application connected everything was good. Still need to figure out more about appradio in general but this was the missing piece in my set