Hi Maggie Judge! Let me know if this helps answer your questions. We have a Jive whitepaper titled, 6 secrets of solid social business deployments that is a good read about the various roles you want for implementing Jive. Also our Social Business Blueprint has some helpful information regarding steps in place needed for rolling out Jive and some best practices. Once again, let me know if this was the kind of information you were looking for
Just ran across a discussion about roles within a community. Might help give some ideas as well.