Alright, jmckell, just got off the phone with my friend who has 22 years as an Acura Mechanic.
He said, "provided the wheels have been balanced and the cords are not torn within the tire (making it out of balance) and without pressure applied to the braking system, and you notice a variable wheel shimmy that occurs side to side or front to back whether constant, intermittent or timed - that diminishes or disappears when warmed, I would look into the INNER JOINT OF THE AXLE." The only true way to acurately diagnose (other than removing possible causes such as a out of balance tire) this problem is to remove the hub unit, then the axle, and inspect for worn metal and possible rust. Off the top of his head, Acura charges $800.00 to replace both inner joints along with the hubs which would be done at that time.
Whew - I was typing the while talking to him so I hope it all makes sense.
KNLNGUS.