Thanks to Anthony Williams, co-author of Wikinomics:  How Mass Collaboration Changes Everything, and a keynote speaker at the government-industry Executive Leadership Conference this week in Williamsburg, for his succinct phrasing of Government 2.0: 

Government 1.0                                Government 2.0

• Silos                                        Single window
• Multi-level                                 Integrated
• Few channels                           ‘Any’ channel
• Paper                                       Digitized
• Passive                                    Engaged
• Mass                                       Customized 

In the U.S., government is us.