Shimmy in high speed corners

sig11

I first noticed this odd behavior at Mid-Ohio last month. At the Kink (back straight has a slight right hand kink) I started to feel the car make a slight shimmy but generally feel stable there and anywhere else on the track. It only felt really odd in the rain.

Lately I've started to notice it on right hand highway curves and it's got me worried. It's sort-of like the front wheels wobble in short bursts. Could it be the control arms?

I'm going to take a trip to the dealer and see what they say since I still have ~2,500 miles of my warranty left but I wondered if anyone else had experienced a similar problem that might help me diagnose it.

Suspension is stock aside from Hotchkis swaybars, whiteline rear endlinks, and SPL camber arms in back.