About five or ten seconds after I start the car, there is a noise that comes from the trunk area. It sounds like an electronic servo motor generating. I've narrowed it down to the passenger side trunk area. Anyone know what this may be?

dont worry about it nothin to be affraid of it is just the load leveling device.
if you want to check to make sure it is this take a little drive by yourself and then get a couple of you "big" friends and put them in the rear seat and it should almost immediately start to level the car.