This sounded a bit more promising as to USB. Still looking.
USB Digital Connection for iOS on the Front Panel
A USB port on the front panel allows convenient connection of an iPod® and iPhone®, which also charges the iOS device when connected. Because the digital signal from the iPod and iPhone is transmitted directly to the AV receiver, there is no signal–loss or interference. You get to enjoy the best possible sound quality. In addition, you can use the receiver’s remote control unit to operate the iPod and iPhone for basic playback control.