Facebook Privacy Check - Check The Privacy Settings Of Your Profile
Facebook is a wonderful tool for social networking and business promotion. However, like any public forum, you need to be aware of some of the risks you need to protect yourself from. Just as you wouldn't walk down the street waving wads of cash in the air, you should also make sure you're not doing that online. Of course, online it's less obvious where your weak spots are, so have your profile checked.
Here's the link to a website that check's your profile for you and let's you know where your weak spots are: http://www.reclaimprivacy.org/.
Just follow the instructions on this site and make sure you're keeping yourself and the other people in your network safe.