Now that development and testing is virtually complete and certification testing is underway, production and customer deliveries will soon start unless there are any showstopping issues. Generally, dealer deliveries start about three to four weeks after Job 1, so those early models should be rolling off trucks and onto dealer lots in early December.
However, with California being one of the launch markets for the Volt, we would be surprised if GM doesn't hold some kind of event to deliver the first customer car in conjunction with the press days for the Los Angeles Auto Show on November 17–18. Between now and November, the Detroit-Hamtramck assembly plant will continue building the pre-production units that are going into GM's captured test fleet for use by employees for real-world evaluation.
[Sources: Translogic, General Motors]