so we got the car back yesterday (1 week after dropping it off). They replaced the front rotors and pads and replaced the drive shaft. This has cured the scary ratteling sound and, I presume the vibration while breaking at high speeds (I haven't had to break that much yet).
Also, the thumping sound is now gone; however, there is a NEW sound now when turning the wheel all the way in any direction while the car is in motion. When making a sharp turn into my parking lot or parking space, there is like this not-all-that-faint grinding sound coming from the back of the car.
They didn't seem to think there were any CV joint problems and they think the thumping I heard was from the front rotors... but this is different. I've been googlin' (which is dangerous when you don't know what you're reading) and I'm thinking maybe is something with the rear-differential gears. Maybe the fluid is just low? I dunno.
I'm debating how long I should wait to call the dealership back.