At one point I saw someone post something about what the two extra connectors on the Pi were for, but I can't seem to find that post. (Maybe just wasn't agressive enough about searching!)
The ones I am talking about are the one right next to the Broadcomm chip (and the Pi logo) and between the HDMI and LAN connectors.
I do remember that one of them is a display interface, but can't remember any of the specifics. (I want to research possible displays to connect there.)