How can I watch the countdown and launch? The launch is being televised on NASA TV. NASA TV is provided via cable network in various locations across the United States and outside the United States. There are several streams available at - http://www.nasa.gov/multimedia/nasatv/index.html
Another option for Web users is the Virtual Launch Control Center were you can follow along with activities as they occur and also see video clips taken from NASA TV coverage http://www.nasa.gov/mission_pages/noaa-n/launch/vlcc.html. An embedded link to NASA TV coverage will also be available from this site on the day of launch.
Photos of pre-launch processing at Vandenberg and the launch can be viewed by going to the online Kennedy Multimedia Gallery at - http://mediaarchive.ksc.nasa.gov/index.cfm. Click on the Expendable Launch Vehicles category near the bottom of this page and then on NOAA to access these photos.