Third Person Rotation Lagging

I was looking over the Fluid Camera Resource but since it's based off the vehicle code all the camera lag is based of player velocity. I just want rotational lag that will change when you turn in place or the player is manually changed in orientation with setTransform(). Has anyone ever implemented this? It's really beyond my understanding of the engine and math at the moment, but it's not entirely necessary to me either, was just checking if anyone had and would be nice enough to share. I'll probably looking at hybriding the advanced camera's orbit and third person cams if I try it myself.