BrainJams is a type of Unconference methodology developed by Chris Heuer et al.
"A BrainJams event is an unconference which combines knowledge networking and confersations in open spaces. We strive to bring people together from Non-profits, Technology, Business, the Arts and Government to share our insights and experiences to accelerate the pace of postive change and innovation in the world. The organizing principle of each event is separate from the format. While each BrainJams event can focus on different topics, the principal focus of our conversations at present is on how real people are using emerging social media tools (i.e. Web 2.0, citizen journalism, blogs, podcasts, social bookmarks, open collaboration, etc.)." (http://www.brainjams.org/what-are-brainjams)
See this blog entry comparing two modes of collaboration, http://www.brainjams.org/blog/chrisheuer/filling-the-funnel-sharing-in-the-knowledge-economy