This webpage has a list of articles detailing many of the issues and ideas surrounding starting a homeschool support group. You'll find discussions of everything from why you should form a support group, to choosing a leader, to delegating and handling tough situations.
NATHHAN (NATional cHallenged Homeschoolers Associated Network) is a Christian, non-profit organization dedicated to providing encouragement to families with children with special needs that are homeschooling. They publish an online or hard copy quarterly newsletter. They also publish a family directory, updated each year. They have a large lending library by operated by mail.
Waldorf Answers provides answers about Waldorf education that parents and prospective parents may have, and to clear up some of the misconceptions that may exist about Waldorf education. Their intention is to provide a straightforward presentation of the facts about Waldorf education.