Mark Stone has made a career out of studying collaborative communities. As a university professor with a PhD in philosophy of science, he has studied and published on the disruptive community conditions that create scientific revolutions. More recent work has involved the open source community, as editor for Morgan Kaufmann Publishers covering operating systems and web technology, then as Executive Editor for Open Source at O'Reilly, and as the Editor-in-Chief of the Journal of Linux Technology. For the last six years he has worked with various dot-coms on tools for collaboration and online community building, including as part of the executive team managing top tier technology sites such as Slashdot (3.5 million page views per day served), and SourceForge.net (1 million registered users). As Director of Product Development for ManyOne Networks, he is currently working on the next evolution of online community, leveraging 3-D environments and new tools for knowledge management.