322 Personal Content Experience: Managing Digital Life in the Mobile Age Hyman P. (2005) State of the industry: Mobile Games. Game Developer, Sept., pp. 11–16. Jenkins, H. (1992). Textual Poachers. Television Fans and Participatory Culture. Routledge, New York and London. Laukkanen T. (2005) Modding scenes: Introduction to user-created content in computer games. Online document, available at http://tampub.uta.fi / tup/951-44-6448-6.pdf Lehikoinen J.T. and Kaikkonen A. (2006) PePe fi eld study: constructing mean- ings for locations in the context of mobile presence. Proceedings of the 8th conference on Human-computer interaction with mobile devices and ser- vices, pp. 53–60, ACM Press, New York, USA. MacEachren A.M. (1995) How Maps Work. The Guilford Press, New York, USA. Montola M. (2005) Exploring the Edge of the Magic Circle. Defi ning Pervasive Games. DAC 2005 conference, Dec. 1–3. IT University of Copenhagen. Available online at http://www.iki.fi /montola/exploringtheedge.pdf Naaman M., Harada S., Wang Q.Y., Garcia-Molina H., and Paepcke A. (2004) Context data in geo-referenced digital photo collections. Proceedings of the 12th annual ACM international conference on Multimedia, pp. 196–203, ACM Press, New York, USA. Sarvas R., Herrarte E., Wilhelm A., and Davis M. (2004) Metadata creation system for mobile images. Proceedings of the 2nd international conference on Mobile systems, applications, and services, pp. 36–48, ACM Press, New York, USA. Schwartz E. (2006) The Net Finds its level. InfoWorld, Oct. 23, Issue 43, 10 p. Suomela R., Räsänen E., Koivisto A., and Mattila J. (2004) Open-Source Game Development with the Multi-User Publishing Environment (MUPE) Appli- cation Platform. Proceedings of the Third International Conference on Enter- tainment Computing, pp. 308–320. Springer. Toyama K., Logan R., and Roseway A. (2003) Geographic location tags on digital images. Proceedings of the eleventh ACM international conference on Multimedia, pp. 156–166, ACM Press, New York, USA.