From what I've seen it's all speculation...
All I know (from my dealer in Germany) is that if I order my car in April like I planned to, it will be a MY 2011 and not a 2010. She couldn't give me any other info just yet. She said once she finds out she will let me know what the new options and stuff are. Only thing that people seem to be sure of is new LED tail lights.
Since I'm planning on ordering in spring/early summer anyway, I will just have to wait and see, so the rumors and speculation really don't bother me much. If I was planning on ordering now though, I guess it would make a bit of a difference.
'11 BMW E92 ///M3 - ZCP and DCT
'15 Ford F-250 - Lariat, 6.7 Powerstroke Turbo-diesel