We have tested the latest 2 releases on our PAL XBOX 360 console to see whether or not they are region free. We can confirm that:
Battlefield Bad Company 2 Ultimate Edition - 360 (In stock usually ships within 24hrs)
and
NHL 11 - 360 (Preorder)
...ARE NOT REGION FREE. Unfortunately these will not work on PAL XBOX 360's. Stay tuned for more region testing.