Lee's Sandbox trainings are the best! I have loved them and having a weekly time to ask questions - which isn't really what that was intended for. However, it would be great to have a weeky usergroup where clients can join together and a we could just ask questions and people could help each other - and a Pathable person could correct anyone, sort of facilitate. I know I learned from listening to other people's ideas.
That or short vignettes of very specific ways people have used the system (like a showcase idea to other event professionals/program specialists/event tech specialists).