Version 2.0 and later ramps up the volume when you start it up. I think they are working on making that feature a little more consistent in the next beta that's coming out soon (as I sometimes had situations where it did not ramp).

I agree, though, that it would be nice if I could tell it "every time I boot it in the car, no matter what, set the volume to -35db."

As it stands right now, I am in the habit of turning the volume down before shutting off the ignition. I would love it if the player would simply do that for me every time.