Augmented Reality was not meant to hit the iPhone 3GS until at least the release of iPhone OS 3.1. Download the new Yelp app. Shake your iPhone 3 times. That activates a feature called Monocle. A blue box will come up saying “the Monocle has been activated.” It will create a button in the top right corner. Now you should be able to look at the bars, restaurants, etc. Only works on iPhone 3GS.

This one not about location, but about people. This app uses the Flickr facial recognition technology of Polar Rose to identify a persons face and pull up info like their online profile and contact info. Both creepy and amazing at the same time.

Not only is this augmented reality app cool, but its useful as well! This iPhone app will help you find the nearest subway station. No need to ask for directions, and you will never get lost.