I know a lot of organizations have been successful by reframing their inservices as "community meetings," and conducting them in a truly egalitarian manner.
Are you familiar with the concept of "learning circles?"
The folks over at the Culture Change Now website have some great resources on how to create a high involvement organization. They have a feature called, "Ask Pact" and listed there is a helpful comment by Nancy Fox, the Executive Director of the Eden Alternative. She points to a document that lists Ten Ways to Create Involvement (opens as a .pdf file), created by Action Pact for Eden Alternative trainings.
"Calling the Circle: The First and Future Culture" by Christina Baldwin (1998) Bantam Books
Baldwin has been writing and teaching the Circle since 1991. On the back cover it says:
"The kind of circle this book addresses is a council of ordinary people who convene to create a sacred space and from that space accomplish a specific task, supporting each other in the process."