Palomar College in California has free access online tutorials on the basics of physical anthropology written by the Department of Behavioral Sciences.
Published by Elsevier, the Journal of Human Evolution concentrates both on paleoanthropology and on comparative studies of existing species. Subscriptions are necessary to view all articles but some can be found free on Sciencedirect, linked from the Journal of Human Evolution's website.
The American Association of Physical Anthropologists' official journal is a subscription service with up to date research.
Building on the work of Louis Leakey in Africa, the Leakey Foundation is a useful resource for grants and anthropology talks explaining the origin of the Leakey family's contribution to physical anthropology.
An endeavour of the University of Texas, eSkeletons is an online interactive site dedicated to comparative skeletal primate anatomy with taxonomy information, useful for students of anthropology.