I love it when someone builds a new Facebook app that takes a web-based function and re-creates it inside of the Facebook architecture.  Whether you’re moving a product or driving advocacy-based action, addressing your Facebook audience with a tool that gets the job done without linking visitors to an outside website is the best way to go.

That’s why I’m impressed by Delta Airlines new Ticket Window Facebook App.  You can actually search for flights and book tickets directly from the Delta Facebook Page.   The app is far from perfect, but it is a noble effort for a fairly complex and data-intensive e-commerce application.

You have to give Delta kudos for being the first airline to build a Facebook ticketing app.  Here’s hoping another airline won’t find a way to charge a fee for ticketing on Facebook.