Given it's about time she was facelifted, the treatment thus far appears largely inline with that given to the E90; revised bonnet, different mirrors, remodelled front & rear bumpers & LED tail lights (pictured on the blue coupe in the link) coupled with a few little bits'n'peices on the inside.
See link:
http://www.e90post.com/forums/showthread.php?t=341389
http://www.motorauthority.com/spy-sh...ies-coupe.html