Image from Google
At this point, it is not 100% clear how far the company will go in terms of integrating Open Social in Cyworld. Most basic implementation can be something like making Cyworld an Open Social container so that Korea's third party developers can introduce and sell interesting small applications to the minihompy users. That's almost given, I would say, but it will be more cool to see Cyworld's social graph become available to third party developers so we can see some interesting apps that leverage Cyworld's "1-chon" social graph, or better yet, Dotori (acorns) virtual payment system. If app developers can piggyback on Dotori system, it will allow micro payment and help monetizing apps -- which will lead to more active participation of app developers.
Largely, Cyworld Minihompies have been called a closed ecosystem. Now Cyworld wants to become "as open as Facebook", according to the article quoted above. Hope Open Social will rejuvenate the recently stagnating Cyworld, the "mother of all social networks", by bringing in lots of interesting apps to the game.