I think the OP is right - as far as I can tell, there are quite a few new stock emoji... or at least, so it seems. Maybe I didn't swipe the screens enough before to realize how many there are, but they're a lot of fun to add. Too bad they only transmit to other iDevices.
I believe he's talking about the built in characters, which you can input anywhere by enabling the Emoji keyboard.
I'm also wondering what the working app name is. The new ones don't show up in my current emoji setup.