My info on USB in the battery compartment is from here, and nowhere else. It merits further investigation, IMHO.

(Note Texrat specifies those pins are used for something else shortly below, but if you read on, Igor contradicts him. And Igor knows some serious stuff about hardware... but he didn't say they are USB, either. So it's still rather inconclusive.)

Not anymore, it ain't. Just keep on a-readin', stranger; there's USB in them hills.