I've got the same rattles, but have not taken it to the dealer yet. I did a quick search on http://www.alldata.com/TSB/59/075908aI.html and did find "NV006-06 JUN 06 Body - Moonroof Rattles" so I am hopefull that this can be fixed. I also have a rattle from the drivers b pillar right by my left ear that is triggered by rough roads or music with lots of bass in it. I'm hoping this bulletin can address the issue "BO017R-03 APR 06 Body - Interior Trim Panels/Garnish Loose"

I don't have an all data account, but expect that a dealer would.