There should definitely be a fix for the wind noise.
The first day I drove the car home from the dealer, it was a 50 mile hwy. trip, at 80 mph. I had a wind noise that seemed to come from the driver's side rear. I hit all the window switches to make sure they were completely up. That didn't help.
When I got home I rolled all the windows down and back up again. Since that day, in March, I have driven the car 7,200 miles, mostly high speed highway miles and have not had any wind noise,rattles or any other problems.
The main reason I went with an Infiniti instead of a BMW, was for reliability. I had a 540i years back that I had to constantly bring back to the dealer to repair or adjust something.
If my 2010 G37 had rattles or wind noise, it would drive me crazy. I would be the dealers worse nightmare, until everything was fixed to my satisfaction.

 

yea would love to hear of a fix for this. my whistling comes on at 60mph just like the others. i still dont know if its my sunroof or the small fixed window in the back.