For Usenet newsgroups relating to linguistics, see : http://babel.uoregon.edu/yamada/news.html.

abaco.sci.med -- Mediterranean Prehistory Online - General discussion
alt.native -- Native American issues (superceded by soc.culture.native)
rec.food.historic -- ancient foods
sci.anthropology -- anthropology
sci.anthropology.paleo -- evolution of humans and other primates
sci.archaeology -- archaeology
sci.archaeology.moderated -- same as above, but moderated
sci.archaeology.mesoamerican -- Archaeology of Mesoamerica
soc.culture.native -- Native American issues (supercedes alt.native)
sci.lang -- linguistics
soc.misc -- miscellaneous social issues
soc.culture.* -- issues pertaining to culture area/country "*" (quite a few !)
vfr.tni.fr/archeologie -- archaeology (in french : "Le forum francophone de l'archéologie"). FAQ web page here and forum web page here. Search the archives here.