Mobile Commerce (M-Commerce) comprises applications and services that are accessible from Internet-enabled mobile devices. It involves new technologies, services, and business models. While it is different from traditional e-Commerce it can also be seen as an extension of e-Commerce in the sense that it, among others, makes e-Commerce available in a modern way to new application areas and to a new set of customers. The Internet is on its way to leave traces in all aspects of our life independently of where we are. Already today, mobile phones and PDAs become an indispensable part of our life as a source for all kinds of information and services and, especially, as our permanently available interface to our environment. Very soon they will turn into widespread intelligent assistants capable of anticipating many of our wishes and needs.However, for all these changes to happen, key issues of interoperability, usability, security, and privacy still need to be addressed. The Techniques and Applications for Mobile Commerce (TAMoCo) conference series addresses these issues. It provides scientists, practitioners, and students a platform to discuss the latest trends in the exciting above mentioned areas. This book is structured into three parts; Wireless Technologies for the Extended Enterprise: Current State and Future Developments; E-Service Environments: Aspect-Oriented Techniques and Mobile Devices; and, AutoMoCo: Autonomic Computing and Mobile Commerce.