The Falcon 1 launched a few minutes ago, but had “an anomaly” according to the webcast announcer just over two minutes into the flight. This would have been just before 1st stage burnout. A slight oscillation (0.5-1 Hz) was observable in the web feed just before the video was cut off.
There will probably be an announcement tomorrow.
Update 12:40AM: Spaceflight Now has been updating their site with addition ‘details’. Nothing informative yet. The link is to their page for the 3rd Falcon mission, so it will probably get updates as they come in.