Nearest Tube Augmented Reality App for iPhone 3GS from acrossair

This is a good example of how augmented reality is becoming more of a reality than something you'd oly see on "Beyond 200" (or is it called Beyond Tomorow now?).

Holding the iPhone flat, it uses its GPS and internal compass to direct users to the nearest London tube with a series of coloured arrows, giving the approximate distance and relative Underground line.

Where the app really shines is when the handset is held up in front of the user, as it layers the lines on-top of the image being shown through the camera, acting as an interactive window, or 'augmented reality'.