Take a look at Jive SBS: http://www.jivesoftware.com/social-business/solutions/social-intranet/features http://www.jivesoftware.com/social-business/solutions/so

Take a look at Jive SBS: http://www.jivesoftware.com/social-business/solutions/social-intranet/features http://www.jivesoftware.com/social-business/solutions/social... It does essentially that.