Here are the ones I can find. Let me know of others.
www.chathamncblogs.com (blog aggregator -- mostly posts from the Chatham County bulletin board)
http://galinforschoolboard.com (Gene Galin for School Board)
http://cross4chatham.blogspot.com (Mike Cross, Chatham County Commissioner)
http://barnes4chatham.blogspot.com (Patrick Barnes, former Chatham County Commissioner)
http://www.sallykost.org (Sally Kost, Chatham County Commissioner)
www.chathamcoalition.org (Chatham Coalition)
http://www.chathamchatlist.com