I made a 30 minute presentation and demonstration of the work discussed in this thread to the NPI 2008 conference. The presentation may be of interest or use to some so I have published it on my website.

On another note, there seems to be a technical problem with the NPI info in the community layers. It has disappeared from the Geographic Web layer and the version in the Gallery layer seems to be the very first one that I uploaded and is consequently not very good.
I encourage everyone to download the latest version from the top post in this thread. Stay tuned for the next community layer update...

Regards,
Andrew