Evolution of running

For the scientifically minded: I just found this enlightening review of the origins of human running ability by Bramble and Lieberman. While I agree with almost all of the authors' conclusions, they were unfortunately written without knowledge of the revolutionary new evidence just published in Science magazine following long and detailed reconstruction of  Ardipithecus, our oldest  and most surprising ancestor yet.
Another little problem I have with Bramble and Lieberman is their assumption that 'normal' human running involves heelstrike first as the foot lands in each stride. I think this is crucial mistake. More on this later.