Eric,
We're following quite a few Facebook bug reports of the content stream missing. The main culprit actually turns out to be a (unwritten) change that Facebook has implemented where the stream will only show posts from the last 30 days. If you only have older posts, try to make a new one and see if that makes it appear. If not, let us know.
If you're interested in some of the recent Facebook bug-reports concerning the like-box, the most relevant are below:
developers.facebook.com/bugs/151170301676561
developers.facebook.com/bugs/216132691827040
developers.facebook.com/bugs/327563707300835
Additionally, the Like-Box/JFBCFan module will only show posts from the administrator of the site. That's a fixed setting from Facebook that can't be changed. If you're looking to have anyone who's written on your wall show up in the stream, that's simply not possible.
Hope that all helps, but again, if not, let us know.
Thanks,
Alex