For anyone who hasn't checked out Pew Internet's latest study on Government Online, it quantifies and explains public use of government online services. The report also includes a look at governments opening up data. Here is an excerpt:
"...state and local agencies are also getting into the act. The District of Columbia’s Apps for Democracy--which offered a cash prize to the developer who could produce the most user-friendly applications based on government data—ultimately led to the development of 47 different applications (with an estimated value to the city of $2.3 million) at a cost of just $50,000 in prize money. The City of Santa Cruz, California used collaborative online tools to enlist the help of citizens in closing a $9 million budget gap."
Download the full report here: http://www.pewinternet.org/Reports/2010/Government-Online.aspx