Facebook on most February flights. The promo is being sponsored by the Ford Motor Company.
Alas, its not as generous an offer as the one Delta, Air Tran and Virgin with partner GoogleChrome gave during the holiday season (Nov 20, 2010 through Jan 2, 2011): free access to all internet sites. Internet will be available in February but at the usual prices: $4.95 up to $13 for very long flights.
Still, we can thank Ford for its largess: Facebook access is better than nothing. Though your Facebook friends may wonder why you're updating your status every two minutes.