was giving examples of mixing reality with virtual world. As a quite illustrative example he showed how a fighting characters of card game could revive by virtually augmenting fighting capabilities - though this was nothing really new, Albrecht notes even more critically. Then he introduced sensonomy as concept to combine intentional and unintenional tagging of users, known from web (pagerank, social tagging), for the real world in order to increase the quality of location tracking using wifi. He showed from a simulation how location accuracy could be increased by user participation. He did not really talk about the motivation of users to do that which should be the pivotal requisite for that system. The other topics of lifelogging, capturing environmental data from crowds were not new either, but in the end his example of pet lifelogging put some nice perspective. I'm quite convinced that people might enjoyunconventional pics taken by their cat, information about which other cats she meets derived from face recognition of others und to compute facebook-like relationships if combined with need-solving applications such as pet-tracking.