Introduction Editor's Introduction i Letter from the New Chair ii Feature Articles On Fuzziness in Relationship Value Segmentation: Applications to Personalized e-Commerce Miguel-Angel Sicilia and Elena Garcia 1 Using Caching for Browsing Anonymity Anna M. Shubina and Sean W. Smith 11 Web Services Discovery Based on the Trade-off between Quality and Cost of Service: A Token-based Approach Patrick C. K. Hung and Haifei Li 21 Equilibrium Analyses of Market-driven Agents Kwang Mong Sim 32 Conference Report The 2003 ACM E-Commerce Conference Kevin Leyton-Brown, Bob McGrew and Ryan Porter 41 ISSN 1551-9031