Ken Reid recommends two New Jersey GIS resources:
New Jersey Geospatial Forum (NJGF) and NJMunicipalGIS at yahoogroups as GIS resource for NJ. NJGF is an umbrella organization for NJ and NJMunicipalGIS has over 160 members.
https://njgin.state.nj.us/OIT_NJGF/njgf_organization.jsp
http://tech.groups.yahoo.com/group/NJMunicipalGIS/?yguid=89749886