"Augmented reality will allow Frijj customers to interact with the brand by holding up a bottle in front of a webcam to gain access to a real- time environment. A Frijj Swamp Soccerette then appears to climb out of the bottle and perform an on-screen cheer." An interesting take on commercial use of AR.

"Augmented reality is a term for a live direct or indirect view of a physical real-world environment whose elements are merged with (or augmented by) virtual computer generated imagery - creating a mixed reality." This explains AR fairly well.

"By using your Android phone's orientation sensors, we can show you a star map for your location. Explore planets, stars, constellations, and more." Sky Map uses the phone's GPS, accelerometer, and compass to create a star map specific to where the user is when they point the phone towards the sky.

Realtà Aumentata - The future of education. This is more of just a demonstration than an explanation.

Phone hacker Chris Hughes demos an open source software project that makes creating "augmented reality" a cinch. He shows how a virtual object (like a 3D spaceship), in cahoots with live footage, can interact with the real world right through a web browser. via Chris Hughes: Augmented reality made easy | Video on TED.com.