James Avery - who recently made the switch from working full time to working for himself - has started a Yahoo! Group for those who are independents or are thinking about going independent. The Group is called Going Independent, and already has over 65 members.
Right now the Group is serving as mostly a coffee house-type list, with people introducing themselves. The real power of this Group, in my opinion, will come once the Group has gotten large enough and people start utilizing it as a resource for advice and answers to common questions.