Welcome to the 5th International Conference on Open Source Systems! It is quite an achievement to reach the five-year mark - that's the sign of a successful enterprise. This annual conference is now being recognized as the primary event for the open source research community, attracting not only high-quality papers, but also building a community around a technical program, a collection of workshops, and (starting this year) a Doctoral Consortium. Reaching this milestone reflects the efforts of many people, including the conference founders, as well as the organizers and participants in the previous conferences. My task has been easy, and has been greatly aided by the hard work of Kevin Crowston and Cornelia Boldyreff, the Program Committee, as well as the Organizing Team led by Bjoern Lundell. All of us are also grateful to our attendees, especially in the difficult economic climate of 2009. We hope the participants found the conference valuable both for its technical content and for its personal networking opportunities. To me, it is interesting to look back over the past five years, not just at this conference, but at the development and acceptance of open source software. Since 2004, the business and commercial side of open source has grown enormously. At that time, there were only a handful of open source businesses, led by RedHat and its Linux distribution. Companies such as MySQL and JBoss were still quite small.

In today's rapidly changing global work environment, all workers directly experience increased organizational complexity. Companies are functionally distributed, many across the globe. Intense competition for markets and margins makes adaptiveness and innovation imperative. Information and communication technologies (ICT) are pervasive and fundamental infrastructures, their use deeply integrated into work processes. Workers collaborate electronically with co-workers they may never meet face-to-face or with employees of other companies. New boundaries of time, space, business unit, culture, company partnerships, and software tools are driving the adoption of a variety of novel organizational forms. On a macro level, these changes have started to reshape society, leading some to speak of the "Network Society" and "The Information Age."

This book begins with consideration of possible frameworks for understanding virtuality and virtualization. It includes papers that consider ways of analyzing virtual work in terms of work processes. Following that, the book takes a look at group processes within virtual teams, focusing in particular on leadership and group identity. The book goes on to consider the role of knowledge in virtual settings and other implications of the role of fiction in structuring virtuality.

Welcome to the 5th International Conference on Open Source Systems! It is quite an achievement to reach the five-year mark - that's the sign of a successful enterprise. This annual conference is now being recognized as the primary event for the open source research community, attracting not only high-quality papers, but also building a community around a technical program, a collection of workshops, and (starting this year) a Doctoral Consortium. Reaching this milestone reflects the efforts of many people, including the conference founders, as well as the organizers and participants in the previous conferences. My task has been easy, and has been greatly aided by the hard work of Kevin Crowston and Cornelia Boldyreff, the Program Committee, as well as the Organizing Team led by Bjoern Lundell. All of us are also grateful to our attendees, especially in the difficult economic climate of 2009. We hope the participants found the conference valuable both for its technical content and for its personal networking opportunities. To me, it is interesting to look back over the past five years, not just at this conference, but at the development and acceptance of open source software. Since 2004, the business and commercial side of open source has grown enormously. At that time, there were only a handful of open source businesses, led by RedHat and its Linux distribution. Companies such as MySQL and JBoss were still quite small.

This book begins with consideration of possible frameworks for understanding virtuality and virtualization. It includes papers that consider ways of analyzing virtual work in terms of work processes. It examines group processes within virtual teams, focusing in particular on leadership and group identity, as well as the role of knowledge in virtual settings and other implications of the role of fiction in structuring virtuality.