If you've ever had trouble following a lengthy conversation on Facebook, you'll be relieved to hear the social network has decided to try and make the situation a bit better by introducing conversation threads. The long and the short of it is that you'll now be able to reply directly to an individual comment. For now, you will have to opt-in to replies, and can do this on your admin panel under the "Manage Permissions" section.
The most interesting conversations will also filter to the top of your page. Facebook says this change can not only make conversations more easy to follow, but also allow Page managers to interact more directly with fans.