hey! I just got the same email from nullmask, and I was going to post it, but it looks like someone else beat me to it.
I was thinking that the word "hair" has "air" in it. And hair can be wavy. But alas, the answer was not hair. Notice how he says "...somewhere." I think the different word with "air" in it could have a variation such as "where" or "wear"
So where does that leave us? "A word that points to your head." brain (brainwaves?), hair, headwear such as hats, hairdos (flock of seagulls?). These are things related to the head, but what points to the head. ARRow?
I don't know. I was hoping that I would think of something during my rambling, but it appears I haven't. I hope someone else thinks of something.