There was some confusion about the which Lightning adapter is included with the iPhone 5. I contacted Apple today to get some clarification.
“The Lightning to 30-pin adapter does not come in the box with iPhone 5. It is sold separately,” Apple spokesperson, Natalie Harrison, told The Loop. “However, the Lightning to USB cable does come with iPhone 5 for connection to AC chargers and other devices.”
So, there it is. You do get the USB cable with the new iPhone.
Update: I changed USB adapter to USB cable to just clarify what’s included.