dallasb - front shocks is the number 1 suspect, but a bit early for an '08 with 12k miles on it. good point about the stethoscope, i may need to get myself one...
aptbldr - that's what i thought first, but then it should've happened before on my bike and should be happening on every Ulysses (every Buell maybe). I don't think it is. I don't think it's the rotor. thanks anyways.