This wiki offers an evolving collection of technology tools for collaborative work and online education. It is maintained by Margaret Riel and faculty and others from the Masters of Arts in Learning Technologies, Graduate School of Education and Psychology from Pepperdine University. There are a variety of tools and other useful links here -- watch out for currency, though. When visiting the site on 4/1/10, the last update had been Dec 2009.
By Chuck Frey, posted to Mind Mapping Software Blog October 21 2008. This blog concentrates on mind mapping software. In this post, they make recommendations about software that will be useful in project management, though presumably some PM tools will also include such mapping features.
By Dan Woods in the JargonSpy column of Forbes.com June 9 2009. Woods explains how his work team can work more efficiently using collaborative mind mapping for projects.