Facebook launches networks for Companies. From Niall Kennedy:

Basic profile information still seems geared towards college students and dating. Members can self-select what they would like to find on the network including friendship, dating, a relationship, random play, or "whatever I can get."

My Microsoft social network on the site is currently filled with recent graduates who most likely had a profile before entering the full-time workforce but I expect more users of all ages jumping in soon to see what all the fuss is about.

Now that it is done, this seems like a pretty dang obvious move. The work place is a fertile social network. Most people that work together also play together. However, many companies don't condone this kind of activity. Or atleast they don't want it happening in the open. So, it'll be interesting to see how employees use Facebook.