I've got a thumping noise that slows and speeds up relative to car speed and wheel rotation. It exists ALL the time, in any gear, with the brakes applied or coasting. It appears to be most prominent on the front passenger's side. On top of a thumping noise that reverberates through the whole car there exists a physical up and down motion. I can literally watch the front end of the car rise and fall as though moving over a tiny speed bump with each wheel rotation.

The only action I've taken to really see what's going on was to jack the front end and rotate each front wheel to feel for a bad bearing. No noticeable noise or resistance there. What can I test from here to diagnose?