In this paper we describe the design and implementation of a mobile phone picture sharing system MobShare that enables immediate, controlled, and organized sharing of mobile pictures, and the browsing, combining, and discussion of the shared pictures. The design combines research on photography, personal image management, mobile phone camera use, mobile picture publishing, and an interview study we conducted on mobile phone camera users. The system is based on a client-server architecture and uses current mobile phone and web technology. The implementation describes novel solutions in immediate sharing of mobile images to an organized web album, and in providing full control over with whom the images are shared. Also, we describe new ways of promoting discussion in sharing images and enabling the combination and comparison of personal and shared pictures. The system proves that the designed solutions can be implemented with current technology and provides novel approaches to general i...