I just got a hold to my friends X2 and ripped the entire system partition from it which of course includes the Official HDMI Mirroring from Motorola. Pushing to my phone shortly to see if it works on the Atrix and if so I will be posting the APK. There are also some other nice apps on the X2 that arent included on the Atrix and if they work after testing, I will post them as well