"City of San Francisco, CA has launched their Open 311 solution called HeyGov! for San Francisco .  HeyGov! is a SaaS (Software as a Service) offering from Microsoft Partner, ISC, that provides a new and engaging way for citizens and governments communicate more effectively in the Web 2.0 era.  

The service requests are captured from device-centric applications or entered by city’s 311 staff into their existing CRM (Customer Relationship Management) system, exposed via an API based on Open 311 standards and visualized via a rich user-interface built with Silverlight 4 and Bing Maps. Built and hosted on the Windows Azure platform, the HeyGov! solution also takes advantage of virtually unlimited storage and processing power of the cloud and provides the ability to quickly address service requests and implement updates even during peak times."

More details here...