The UrbanWeb project explores an open Web approach to pervasive computing and aims especially at urban environments. The project hypothesizes that pervasive computing and recent trends in Web technologies (e.g. Web Mashups (service aggregation), collaborative tagging, social filtering, etc., often described as Web 2.0 techniques) can be combined to create an open, highly scaleable, contextaware architecture that supports true pervasive information applications and services which not only adapt to the users physical and social context, but also let users actively contribute to the information available in both private and public places. The project has a number of foci, including Infrastructure, Structuring mechanisms, Context matching, and Interaction techniques.