Smallworld already is using opengraph in sense of bookmarking updates is rendering Ogg and Fb metas when submitting.
When shared you can in your facebook/twitter/g+ like/unlike/share or whatever.
I was thinking though to add a search filter to see how many people had shared every particular update in the social networks but finally I descided it would make the update's tool-line too busy.
For what purpose is it needed, what does it need to show ?
Programming is like sex:
One mistake and you have to support it for the rest of your life.
From Skagen, Denmark