there's TV documentaries about some similar systems in US cities that used to play on Discovery.
Think SimCity without the animation and buildings, just the road network.
Clickable icons for each and every electronic roadsign so the operators can change them to read what they should (automatically calculated so that surrounding signals are switched to maintain a legal and safe road situation).
I'm working on a webapp on which houses, appartments, ... can be sold
not by private persons, but by the notary's themselves, so everything (except for the signing of the document by the notary) can be done online.
it's build in GWT and uses Spring, Hibernate and some other smaller frameworks.
Working on creating a PHP environment, which hooks up to my own CMS. Then building my own template system, that just uses plain html, but the environment knows what to do with and what data to enter. Its going ok atm :)