Union County Community Mapper
Union County's Community Mapper application has been converted from ArcGIS Server to the Google Maps API.
Users of the map can select one or many parcels by either clicking the map or using a single search text box. Once parcels are selected a user can uncover lots of spatial data by clicking various tabs within the information window. Answers to questions like "What school district am I in?", "What flood zones are on my property?" and "Where are my closest parks, libraries and bus stops located?" are just a few mouse clicks away.
It is also possible to export parcels in kml, csv and xml formats.
Jason Sandford has also written about the reasons for moving over to the Google Maps API and some of the advantages and disadvantages of the update on his blog GeoJason.