Its Official, the pics we saw of a E92 in Germany with a strange aerodynamic pack is official BMW
First pic is from July Parts system, making it Official
Next 2 pics below are the original ones someone took for the board
Edit: And here's are the pics from the E92 accessories brochure -
http://www.e90post.com/forums/showthread.php?t=23522
Edit #2: Here are new pics -
http://www.e90post.com/forums/showthread.php?t=24351