^ I wasn't familiar with the OBIs until my first Japanese purchase, either. --They don't have that in the U.S., right? I've never seen any come with it, not even when I ordered online. I don't know how other countries are, other than those two, either, since I've never bought CDs from anywhere else. So I have no idea what the OBIs are all about, hah.
Just one of things I've honestly never thought about until now...