This book constitutes the refereed proceedings of the 8th International Conference on Agile Processes in Software Engineering and eXtreme Programming, XP 2007, held in Como, Italy in June 2007. The 10 revised full papers and 16 revised short papers presented together with 4 poster papers, 18 experience papers, 2 research ideas and 3 panel summaries were carefully reviewed and selected from 45 submissions. The papers are organized in topical sections on managing agile processes, extending agile methodologies, teaching and introducing agile methodologies, methods and tools, empirical studies, and methodology issue.