Good review of a confusing subject. Main point I get is the authors think the early forms are often too humanized in the depiction of 'what might have been', which is in large part guess work.-http://www.evolutionnews.org/2012/07/the_fragmented_062101.html

More evidence that A. Afarensis both walked upright and climbed trees, from a young scapula:-http://www.the-scientist.com/?articles.view/articleNo/33017/title/Acrobatic-Ancestors-/-http://www.sciencedaily.com/releases/2012/10/121025150353.htm