Mobile Commerce is considered to be the next-generation e-commerce, since it enables users to access the WWW from anywhere in the world at any time. Because of this, m-commerce has to rely on new technologies, services and business models. Its potential emerges from the fact that the Internet has become an essential component in all aspects of our lives. On the other hand, mobile phones and PDAs have become an indispensable part of our daily routine as sources of all kinds of information and services and, especially, as a permanently available interface to our surroundings. Thus, not surprisingly, the number of mobile services is constantly increasing. Tomorrow, mobile devices will be intelligent assistants capable of anticipating many of our wishes and needs; but, for all these changes to happen, key issues of interoperability, usability, security and privacy still need to be addressed under the special scope of mobile services and commerce. The TAMoCo conference deals with such research issues. This book comprises the papers of TAMoCo 2009. It covers such diverse areas as context-aware mobile applications, web services for mobile applications, mobile technologies in urban systems, mobile technologies for education and autonomic computing and mobile commerce.