Now this is cool and it's such a simple solution. The Airline sends the picture of a 2D barcode to your phone and all you have to do is to hold the phone up against the scanner during check-in and it'll print your boarding pass immediately. I wonder when we'll get it in the US.

Read more here: http://www.smh.com.au/news/news/airport-queues-to-disappear-with-mobile-checkin/2007/10/12/1191696127899.html