Resources:
Congregation: How-To — 8 Design Patterns for a Transformative Event. This story documents some lessons from hosting the big annual gathering of the Enspiral congregation.
How to Run a Sharing Circle - a crucial piece of social technology, explained by Nati Lombardo from TheHum.org.
Notes on how to avoid cults
Unofficial list of congregations and proto-congregations that match some of the microsolidarity patterns:
Enspiral
Life Itself (formerly known as Art/Earth/Tech)
Community Weavers Guild (private)
RatPark
If you have more to add, please contribute