Introduction: Circuits in Common
1.Noisebridge: An Experiment in Radical Openness
2.Altman: Yearning for Community
3.Chaihuo: Between Gifts and Commodities
4.NalaGinrut: Hacking as Spiritual Calling
5.Tokyo Hacker Space: Bricoleurs Respond to the Disaster
6.Gniibe: Hacking to Do No Harm
Conclusion: Are Hackerspaces Prefiguring Technopolitical Alternatives?