Google recently announced that it will begin offering corporate control features for its Google+ social network to businesses for free — at least for a while. If you run a Google Apps domain, you can set up domain-wide restrictions on how your users interact with Google+. Your users can also make “restricted” posts to Google+ which are visible only to members of your domain. It’s social networking, but with corporate oversight.
That’s sounds a lot like Yammer (which Microsoft recently bought for $1.2 billion) and Salesforce.
Google’s move into corporate social-nets is as much a flanking maneuver against Facebook as it is a direct challenge to Yammer and Chatter.