Open Space

Worldwide web site: http://www.openspaceworld.org/

"Did I ever mention that any BarCamp? Conf or open space conf can have a free Pro account at MindTouch? http://wik.is Just ping me for upgrd" --Aaron Roe Fulkerson, http://twitter.com/Roebot/statuses/842628508

http://www.chriscorrigan.com/openspace/

"The" book (there are many books): http://www.amazon.com/exec/obidos/ASIN/1576750248/

Online tool: http://www.openspace-online.com/

Facilitators JohnAbbe knows and recommends:

Jeff Aitken - http://riograndio.blogspot.com/ - magic.teams@hotmail.com
Lisa Heft - http://www.openingspace.net/ (she also posted some things on the Meatball page below, which is itself also pointful)
Gina Lawrie - http://www.GnB.org.uk/
Peggy Holman - http://www.opencirclecompany.com/
Me! - ContactMe

One of the many ProcessArts

SisterSites - Meatball:OpenSpaceTechnology