For New debates about Ardipithecus:

http://www.livescience.com/history/ardi-human-ancestor-hominid-debate-100527.html

Comment on the Paleoenvironment of Ardipithecus:
http://www.sciencemag.org/cgi/reprint/328/5982/1105-d.pdf

Response to Comment on the Paleoenvironment of Ardipithecus ramidus:
http://www.sciencemag.org/cgi/reprint/328/5982/1105-e.pdf

Comment on the Paleobiology and Classification of Ardipithecus ramidus:
http://www.sciencemag.org/cgi/reprint/328/5982/1105-b.pdf

Response to Comment on the Paleobiology and Classification of Ardipithecus ramidus:
http://www.sciencemag.org/cgi/reprint/328/5982/1105-c.pdf