A couple things are neat about this that aren't necessarily obvious.<p>First off, the Falcon 9 v1.1, of which this is the 3rd launch, uses a reusable first stage. Whether that stage is used in an expendable launch profile or in a reusable launch profile it's still the same hardware, the only significant difference is whether or not it has landing gear bolted on (which apparently they'll try to do for the next ISS cargo resupply launch). That's pretty significant because it means that they get additional testing and validation of their reusable first stage in a full up flight profile even on expendable launches like this one. The more they launch with this stage the more experience and confidence they get and the easier it will be to transition to a reusable flight profile.<p>Secondly, this launch should complete the certification program that enables the Falcon 9 v1.1 to be able to compete in EELV launches from NASA and DoD. Currently only the Atlas 5 and Delta IV fill that role (the original launchers developed out of the EELV program) and as a result United Launch Alliance (which operates both vehicles) get a significant amount of highly lucrative business. In 2014 there are 8 EELV launches, for example, and by around 2016 SpaceX could be launching EELV payloads. That's a tremendous amount of potential income for SpaceX (up to billions of dollars a year).
Here is the launch video, from "T minus one minute".
<a href="https://www.youtube.com/watch?feature=player_detailpage&v=AnSNRzMEmCU#t=2302" rel="nofollow">https://www.youtube.com/watch?feature=player_detailpage&v=An...</a>
Just before the launch, when the strongback retracted, did anyone else notice how the umbilical cables became snagged, as the strongback was still retracting? Sure enough, there was a moment where there was no slack, and the strongback actually pulled the Falcon 9 rocket a slight amount, causing it to rock back and forth on the launchpad. You could see it rocking back and forth perhaps by 6 inches or more. The cable snag freed itself and the retraction continued nominally, but the rocket kept teetering for another minute. Pretty interesting. Wonder if they plan for such contingencies.