This book constitutes the thoroughly refereed postproceedings of the Third International Workshop on Innovative Internet Community Systems, IICS 2003, held in L

Thoroughly refereed post-proceedings of the 5th International Workshop on Innovative Internet Community Systems, IICS 2005, held in Paris, France, in June 2005.

The papers in this volume were presented at the workshop “Innovative Internet Community Systems 2003” held on June 19–21, 2003 in Leipzig. IICS 2003 was t