Sergey Sharybin posts an update and an example for the extended baking developments for Blender, describing how to use the new baker tool and how one might use it to bake Ambient Occlusion maps from multiple resolution meshes.
Here I would want to briefly describe how to use it, show some results and most important part would be comparison of different acceleration structures which could be used for this kind of baking
Sergey shows some results from the new Blender Baking tool, and provides a comparison of different acceleration structures which could be used for multi-res baking. Check out the post for here.