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From November 30 to December 2, 2005, INTETAIN 2005 was held in beautiful Madonna di Campiglio, on the majestic mountains of the Province of Trento, Italy.The ideato holdthe'rstinternationalconferencethat wouldhaveas topic "Intelligent Technologies for Interactive Entertainment" seemed to be timely. In thepreviouscoupleofyearstherehadbeenothermorespeci'c-ormoregeneric - events where some of the relevant themes had made it to the front stage. With INTETAIN we were aiming at establishing a conference where intelligent computational technologies are at the basis of any interactive application for entertainment. As "intelligent computational technologies" we mean adaptive media pres- tations, recommendation systems in media scalable crossmedia, a'ective user interfaces, intelligent speech interfaces, tele-presence in entertainment, colla- rative user models and group behavior, collaborative and virtual environments, crossdomain user models, animation and virtual characters, holographic int- faces, augmented, virtual and mixed reality, computer graphics and multimedia, pervasive multimedia, creative language environments, computational humor, and so on. We also believe that there is an important role for novel underlying inter- tive device technologies, for example, mobile devices, home entertainment c- ters, haptic devices, wallscreendisplays, holographicdisplays, distributed smart sensors, immersive screens and wearable devices. Interactive applications for entertainment include, but are certainly not l- ited to, intelligent interactive games, intelligent music systems, interactive c- ema, edutainment, interactive art, interactive museum guides, city and tourism explorer assistants, shopping assistants, interactive real TV, interactive social networks, interactive storytelling, personal diaries, websites and blogs, and c- prehensive assisting environments for special groups (challenged, children, the elderly).