Delta Air Lines' Ticket Counter app for Facebook has been available since August of 2010, but today it gets a convenient extra feature: virtual check-in. At launch, Ticket Counter allowed fliers to book trips and research fares. Today, the airline debuts the new version of the app, which adds the ability to check in for your flight up to 24 hours before its scheduled departure.

The app also allows Delta customers to check their flight status and SkyMiles accounts - Delta's system for tracking trips and redeeming milage rewards - all without leaving the social network. These features were previously available on Delta's website and through its apps for iPhone, Android, and Blackberry, but integrating them into a social hub that many people are constantly connected to makes the process that much smoother.

Get the full story at the Delta Blog