Unfortunately, that's not possible yet. Facebook specifically has a callback that notifies the page whenever a Like has been clicked or a comment has been created. The other social widgets don't have these methods to notify JFBConnect that it's occurred. They all happen within an iFrame, so there's no way for us to capture the activity unless the social network has that ability built in, and Facebook is the only one to do so.
I hope that helps explain,
Alex