Above: Participation network (as of 9/06) for The Plone Collective, Archetypes, Plone Internationalization Effort, ZCoMIX - CMI for Zope, Plone, MailManager, Ingeniweb Products, Zope Group Calendar.
Blue = member contributions, tan = nonmember contributions, thickness is proportional to the number of artifacts in the SF.net database

Here's some resources related to my attempts to visualize and explore participation among members and non-members on SF.net projects.

• Using Networks to Visualize and Understand Participation on SourceForge.net, my final project for for SI 708 Network Theory class at the University of Michigan School of Information
• Animation of the Zope/Plone cluster: Small - Hi res - Longer, with music
• Data set of project membership and participators used from SF.net Database Sept 06 (240MB gzipped to 51MB)
• Some GDF files of clusters for use with GUESS
• The SourceForge Member Network in .net format for use with Pajek
• Sloppy, unsupported perl i used to generate some of this stuff

Enjoy.

Nate Oostendorp, SF.net