One of the best, but perhaps lesser known online discussion groups amongst designers is AnthroDesign, as in Anthropology & Design. The group, which was originally made up solely of anthropologists, has grown to include a range of interests from corporate, academic, non-profit and consulting design/research worlds:
"This group consists of individuals interested in anthropology and design. We are interested in the role of applied anthropology in the corporate, public sector, and medical contexts. Not all list members are anthropologists, but group members share the common interest of applying ethnographic techniques and social sciences theory to industrial, software, and other types of product design."
Membership is permission-based.