Hi. When I posted my question today, I hadn't bought an iPad. Now I have, and I found the answer in the box. There really is a USB port. It's the docking station connector.
I went to a local McDonald's to use their wi-fi to set up the iPad. Man, either this thing is slow, or Mac has a really slow server.
I was hoping I could use iTunes to buy books, but I can't find a way to do it. Apparently you have to go online with the iPad.