Apple has filed a US patent for the a MacBook (upcoming ultraportable version) docking station. The laptop simply plugs into the side of a iMac-like device, complete with ports, and "works similarly to the old PowerBook Duo and its DuoDock base station, but vertically instead of horizontally." Click here for first picture in gallery.
This Apple docking station patent shows a screen base in which you can slide in a MacBook through its side. While this would be difficult to do with current MacBook models, it fits perfectly with the idea of the ultra-light, ultra-slim MacBook that allegedly will be presented at MacWorld[via Gizmodo]