It does seem that it might be more common than a lot of the literature indicates. It is definitely with eye movement and headmovement too (eyes open or closed), for me at least. After reading some of the above posted links (good links by the way, thanks) I tested out different movements. I can hear frequency change with Jaw movement too.
I would say its at least doubles in intensity when I move my eyes or head to the far left or the far right.
On a side, but related note. Theres this other weird thing with my tinnitus. When ever its really quiet, such as when going to sleep, and there is a quick small sound in the room like a pop or crack from the house the sounds shoots thought my head. Its almost like I can feel it intensify in my head real quick and then gone. Its really hard to explain. I will try to think of some more descriptive adjectives to better explain it tonight as it happens.