About NSW is a pilot project produced in-house at the Powerhouse Museum, Sydney. The idea is to access, aggregate and expose government cultural datasets to new audiences online. This includes making improvements to existing data sets so that they can be included on a map, in a timeline, or semantically linked to related data. The site is designed with citizens in mind and requires no specialised knowledge to use, other than the ability to browse web pages.
More info on the project is available here: http://www.powerhousemuseum.com/dmsblog/index.php/2009/09/02/introducing-about-nsw-maps-census-visualisations-cross-search/
and the site itself can be demo-ed here: