Today ran across a “new” iPad case, which will apparently has dual dock-connectors, with a second port on the side to enable landscape docking of your iPad.
Mission repair appears to have gotten ahold of some spare parts for the next-gen iPad. The aluminum shell has a second slot on the long side.
Apple has certainly filed for a patent showing an additional port of some kind, but duplication of function like this seems like something Microsoft would do, not Apple. Taking a second look at that slot, you’ll see it is just the right size for an SD card slot, something Apple already builds in to the iMac and my MacBook Pro.