The city of Graz should provide open access to city data to spur innovation of new urban web applications and mashups that serve citizens. Examples of cities that are already opening up their datastreams include http://datasf.org/ or http://www.toronto.ca/open/.

more information:
“Open Data for Cities: Enabling Citizens to Have the Apps They Want/Need”
http://mstrohm.wordpress.com/2009/10/08/open-data-for-cities/