In addition to training citizen facilitators, I believe its important to train government staff from city, county and state level departments. Without this, public participation, engagement and collaboration can quickly go south. I've seen city-sponsored meetings that seek to gain public input end up in shouting matches that could have been avoided with very simple, basic facilitation skills. This in turn frustrates government representatives that have good intentions and leads to an attitude that citizen engagement is scary, not worth the trouble, etc. I would also add training in collaboration skills.