Python and Approximate Ambient Occlusion

Is there a way to access the new AAO (approximate ambient occlusion) via Python? I don’t see anything exposed in the World object. Am I looking in the wrong place, or is it not available via Python yet?

If not, any guess when it might be made available? I’m trying to use Blender as an external renderer, launching it from the command line.

I suppose I could work around it by having a pre-built scene with the AAO settings already done, but it would be more convenient to be able to set it from Python - especially if I needed to tweak the values.