The photo above is purportedly the 4G Verizon iPhone that is launching in June 2010. If you look at it closely you can see that it has an aluminum uni-body.
Now the picture is grainy, and according to IntoMobile Adobe Photoshop CS 4 was used on this image so I wouldn’t trust it one bit. It doesn’t make sense for Apple to make the iPhone with an aluminum case because it hinders the cellular reception.
Resource:
http://www.iphonestalk.com/4g-verizon-iphone-caught-on-camera/