AlphaWorld is a nice implementation of a virtual world where the 2dimensional map come into help while supporting a 3dimensional movement/walking. It would be interesting to explore the connections between the map and the city and to interview the users to analyse their map analysis skills. How do they relate their position to their place? do they define landmarks? Do they perceive the limits of the map?
On another point of view it would be very interesting to compare the urban plan of AlphaWorld with the urban plan of a similar actual city. Are there differences?