There are a few p&c agents that visit, and I think that any posts you make would get some replies. Todd is the resident expert on auto insurance, and he is just waiting to help.
When starting a new forum, it takes some time to build up a knowledgable base of visitors. The best way to do that is to put posts in the auto or business section. Why don't you give it a shot, and ask some p&c questions in the business section, and help it grow.