LMAO!
I have one inside the front passenger seat-belt pillar.

 

 

Not really. I have a handheld ice scraper in the compartment in the door and don't hear that rattling either.

 

 

I have a rattle that seems to come the dash somewhere. It comes and goes. My 2IS was a squeaker too, but I feel my 3IS is worse.

 

Yes. It seems to come from the window switch area. I took it apart put it back together and still have a rattle. Hear it more with the music but also randomly sometimes. I thought maybe it's a loose screw. I also hear something from the dash and i'm assuming again it's a loose screw.

 

Me too! That little rattle is driving me f'in crazy.

 

i've pin pointed mine in the door to the switch assembly where is snaps into the bezel surround. If i hold the edge of the switch box it stops. I was going to try some hot glue maybe to absorb the movement but haven't tried it yet.

 

Not sure what kind of rattle you have but I had an annoying rattle that I thought was coming from the B pillar. I took it to 1 dealership and they took the panels out, put insulation in, didn't solve it.. Took it to another dealership and they said that the "window seals / weather seals" were "malformed" so they fixed them and I do not have those rattles anymore.