The folks at Digitally Distributed Environments are currently busy putting together a LiDAR model of the city of London. LiDAR or Light Detection and Ranging is used to detect elevation changes and is suited to creating a quick and up to date 3 dimensional models, including man-made structures. DDE has put together a movie of parts of the London model that look strangely molten and slightly other worldly.

DDE has also been busy putting together 3 dimension models of some London buildings (for example but there are many more) and geo-referenced historical maps (1 and 2) for use in Google Earth.