Digitimes is at it again and now believes the iPhone 5 will sport a display smaller than 4 inches (3.5-3.7 inches). They are also claiming that the glass back will be replaced with a metal one.
Other claims are ones we have hear before namely: an 8 megapixel camera, full HD video recording, the iPad 2's A5 dual-core processor and a thinner design. Most "unnamed sources" seem to agree on these specs which means although the iPhone 5 will get a slight spec bump, it is an evolutionary upgrade.
One rumor that we hear was that Apple was testing LTE but I doubt that would make it in the iphone 5.
Let's remember that this is Apple and that they have very strict information protection protocols. Regardless of what we read, no one can be sure of anything until it is unveiled sometime in September or October.