Very nice use of the iPhone 3GS' compass on this navigation app that finds (and points to) tube/metro stations in your vicinity. Seems like the BBC is really roling with the "augmented reality" moniker and you'll hear it way too many times in this three minute video but don't let it distract you from an otherwise great example of a portable HUD.
Augmented Reality Tube Finder
Article No :98 | August 11, 2009 | by Alex Schleifer
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There's actually a new app that finds stations all over the world. Got to have for that world traveler. A little pricey for an app though..