It's segmented with two accounts. An FB@Work account and your regular FB account.
Basically, everything at FB is run through FB. (e.g. Groups for everything!) Someone decided that because FB loves FB so much, and a billion people use it, others would want to run their business through FB as well. Now that there's post and comment search, it's not useless as a repository of knowledge, but at the same time I have a hard time believing that others will love FB@Work as much as FB loves FB@Work.