So I'm just posting this vid for some opinions, this is a warm idle, not cold, but what is the whistle sound? Intake? Or is this something else I should address.
Here's the link, I posted the video to youtube. View: http://youtu.be/2gBbQwDK8xE
Possible IAC problem (maybe a more specific form of what smkshw said). Not sure if the foxes have the same issue as my SN 5.0 did, but my IAC started making noise like that and after replacing it the noise was gone.