From their website:
When you’re traveling this holiday season, you can enjoy free WiFi at 47 participating airports and on every Virgin America flight. Just bring a WiFi-enabled laptop or mobile device and stay connected to family and friends for free while you travel now through January 15, 2010.
Starting Monday, November 16, 2009, you'll be able to win prizes by submitting a photo of yourself using the WiFi in any participating airport or on a Virgin America flight. In addition to being able to win great stuff, we'll feature winning photos on this website.