@jim-chandler, you ask some great questions. Here are my responses:
(1) You may have already found this resource for fossil sites by state: http://www.fossilguy.com/sites/ (this is from Jayson Kowinsky who presented the first webinar).
(2) We will certainly plan for an invert-focused fossil excavation webinar in the future. We heard that same request from many webinar attendees.
(3) Fossil identification is a hard topic to cover in a 30-minute webinar or video. I wonder if fossil clubs/societies nationwide would be willing to contribute their “best practices” for identification of fossils in their various regions, and we could produce a compiled document which would be available under the ‘Resources’ tab. Would this be useful to you?
Stay warm up there in Maine!