The history of Second Life is extensively descibed in the official Second Life guide,  [Rymaszweski et al. (2007)]. Beginning 2004, almost out of the blue, Second Life appeared with a high adoption and low churn rate, now counting, March 2007, over 4 million inhabitants. Considering the cost of ownership of land, which easily amounts to 200 euro per month rent after an initial investment of 1500 euro for a single piece of land measuring 65,536 square meters, the adoption of Second Life by individuals as well as companies such as ABN-AMRO, Philips and institutions such as Harvard is surprising.