Entrepreneur, conference chair, software developer, writer and editor. Founding chair of O'Reilly's Strata Conference and chair of the O'Reilly Open Source Convention. Creator of the Expectnation system for conference organization and management. Was chair of the XTech / XML Europe conference series for 8 years. Author of "Learning Rails", "Mono: A Developer's Notebook". Former editor of XML.com and XMLhack.com. Developer on the Debian GNU/Linux project and the GNOME project. Freelance writer for IBM developerWorks. Co-founder of life-science intellectual property exchange Pharmalicensing.com.