Oh, and by the way-I am a vegetarian.

Some selected references:

Blumenschine, R. J. Prey size and age models of prehistoric hominid scavenging: test cases from the Serengeti: 121-147.

Blumenschine, R. J. (1986). "Carcass consumption sequences and the archaeological distinction of scavenging and hunting." Journal of Human Evolution 15: 639-659.

Blumenschine, R. J. (1986). Early hominid scavenging opportunities: implications of carcass availability in the Serengeti and Ngorongoro Ecosystems.

Blumenschine, R. J. (1987). Characteristics of an early hominid scavenging niche. Current anthropology, Chicago. 28, no. 4, 1987: 383-407, ill.

Aiello L (1992) "Body size and energy requirements." In: The Cambridge Encyclopedia of Human Evolution, Cambridge University Press, pp. 41-45.

Aiello LC, Wheeler P (1995) "The expensive tissue hypothesis: the brain and the digestive system in human and primate evolution." Current Anthropology, vol. 36, pp. 199-221.

Here is a good article that summarizes recent findings that includes the hypothesis that australopithecines did eat meat:

http://www.iub.edu/~origins/X-PDF/Teaford&Ungar2000.pdf