University of Southampton Campus Map
Postgraduate student Colin Williams has created a campus map for Southampton University in the the UK using Google Maps and the University's Open Data Service.
The map shows all the University's campus buildings, live bus times for nearby stops and a number of categories of points of information. The detail for each category of marker is very impressive. For example, the retail category not only displays the locations of all shops on campus but also the locations of all vending machines. It even tells you what each vending machine sells.
The source-code for the map and the map marker set have been made available by Colin under a creative commons licence.