A Taiwanese Mac news site with a history of accurately predicting future Apple products says Apple is currently testing three different prototypes of the next iPhone. From what can be gleaned from the Google translation, tw.apple.pro says one of the iPhone 5 prototypes features a a slide-out physical keyboard -- a form factor that Steve Jobs and Apple have never seemed too keen to embrace.
Another iPhone 5 prototype is said to closely resemble the current iPhone 4 with a longer-lasting battery and an 8 megapixel rear camera. The site suggests that if this prototype is released, the iPho
