Introduction Guest Editor's Introduction Zakaria Maamar, Asuman Dogac, and Walter Binder i Feature Articles P2P M-Commerce in Pervasive Environments Sasikanth Avancha, Peter D'souza, Filip Perich, Anupam Joshi, and Yelena Yesha 1 The Attraction of Personalized Service for Users in Mobile Commerce: An Empirical Study Shuk Ying Ho and Sai Ho Kwok 10 A Taxonomy of Indoor and Outdoor Positioning Techniques for Mobile Location Services Vasileios Zeimpekis, George M. Giaglis, and George Lekakos 19 Scenarios of using Web Services in M-Commerce T. Pilioura, A. Tsalgatidou, and S. Hadjiefthimiades 28 ISSN 1551-9031