iPhone 4.0 is looking ever more likely to add the elusive front facing camera. The prototype snapped in the iPhone 4.0 leak was sporting one and now an eagle-eyed iPhone OS 4.0 user has dug out a new clue in some iPhone photo metadata. The big question is: how will you use your new iPhone with a second camera?

Apple’s almost certainly hard at work on the fourth generation iPhone and a pair of new patents seem to hint at what we can expect from the new iPhone. That’s a front-facing camera and Google Latitude-like location features for a start…