More "sources" spent some time sifting through USB device files in the beta iOS 5 firmware and .

"TUAW sources inspecting the USB device files in yet-unreleased iOS 5 firmware have discovered suggestions of two future iPad 3 models as well as a pair of iPhone 5 models. What's most surprising is a big omission: no mention of an iPod touch 5."

The system files showed declarations referencing "iPad3,1" and "iPad3,2" as well as "iPhone4,1" and "iPhone4,2." Aha, you exclaim. How can the iPhone 5 be an iPhone 4?

TUAW has it figured out. "The iPhone 5 will be a 4th generation unit because the iPhone 3G was technically 1st generation," TUAW says. "This throws off the numbering and confuses everyone, so don't fret if you were confused." Or if, after that, you still are.

No mention of an iPod touch 5 shows the iPhone 5 will be announced in September! Here's the reasoning behind that, : "Apple customarily releases the iPod refresh in September. Since the iPod touch is not mentioned in the firmware, it seems the iPod refresh meet will be used by Apple to launch the iPhone 5."