Apple Insider has recently learned that among those leaked pictures of the iPad at Engadget (the ones we decided not to repost), there was also a fourth generation iPhone prototype sitting there, but the news of the iPad completely engulfed any sign that it was a prototype. Looking closer, it appears it is a prototype since the bezel that surrounds the phone is replaced by some kind of black plastic. And if history has anything to show, it will announced at WWDC 2010.
