On Wednesday, January 13, the city of Edmonton, Alberta, Canada went live with their data catalog.
http://data.edmonton.ca provides REST-based access to their data. So for you application writers, no more need to download and maintain data.
Edmonton's data catalog is a great example of cloud computing in government. It runs on Windows Azure, using an open source solution that can be implemented by anyone - just get the code from http://ogdi.codeplex.com
I'd love to hear anyone's feedback on this site, my twitter handle is @keithhu