Google Earth London - Level of Detail/Network Links
All of London's 33 Boroughs are included in the file structure allowing a seamless flythough of the 3D data. Due to ongoing licensing issues this will only currently be available on computer systems run internally within the Boroughs - but it provides an insight into how the work is progressing...
*Update - see also post on Splicing Landmark Buildings and Network Streaming -
A higher resolution version of the movie can be downloaded here (39Mb WMV)