In previous meetings Mike and I have discussed how the system would operate (along with a lengthy discussion about Google Maps/Earth). One import issue Mike brought up was the role of versioning and how that would play out in the system. I think at this point there is a distinction to draw between the IT/programming concept of 'versioning' and one an architect may hold. In programming versioning is the process of tracking changes from a given point in time based on a set of very clearly defined parameters.