Great job by Facebook making it easier to share and not share. Once you have lots of people on Facebook you are bound to have a mixture of who you know (college buds through in-laws). So you need to post on a "need to know" basis. Now you can.
Here's the splash page Privacy Announcement
and the cool new options you can use for each post to decide who you want to include or exclude.
The "Specific People" options lets you chose frienda individually or from your predefined Friend Lists.
So for a small business, you could do social posts just like you send targeted email. Don't think you can do that yet for a large business do to restrictions on Friend List sizes.