This paper summarizes the progress and the future directions of m-commerce research. Despite the rapid proliferation of Internet-enabled mobile handsets, empirical research has been undertaken only in a limited number of research areas. Important progress has been made in mobile Internet and SMS-based mobile advertising adoption, but other important topics, such as e- commerce and m-commerce comparison, mobile-based word-of-mouth, and methodological issues, have rarely been addressed. Future studies should explore these areas. In closing, the seven contributions to this Special Issue are introduced.