The American Sociology Association (ASA) is a non-profit membership association dedicated to advancing sociology as a scientific discipline and profession serving the public good.
A site created primarily for people taking or teaching classes in sociology, it features interesting, informative, and entertaining commentary from sociologists around the United States.
Social Science Information System, based at the University of Amsterday, gives a global perspective of issues in sociology and the social sciences. Included is its own list of Social Science Weblogs.
Sociology website with content aimed at undergrad students -- goal is to provide a bridge between sociological scholarship and and contemporary issues. Gets over one million hits a month, so is likely the biggest soc website.