Now that the MacBook Pro refresh has happened and the iPad 2 is out, what's left for the rumor mill? The iPhone 5 of course. Citing a Chinese source, Japanese site Macotakara claims that Apple is abandoning the current iPhone 4's exposed antenna/glass backside construction for the iPhone 5. The iPhone 5 will supposedly have an all-aluminum rear case similar to the iPad 2. Wireless signals will penetrate the case via the Apple logo, which will be made from a plastic resin, presumably similar t