Adapting Social Networks to Business Culture

I was reading an article about how Booz Allen & Hamilton have created an "Enterprise Facebook" social networking site called Hello for their employees that is enjoying a high adoption rate. Years ago I worked for BAH and they were very forward thinking in the area of knowledge management with information professionals dedicated to developing a system for sharing expertise. They also had a very simple tool that I've wished for in other jobs - they used to have a ring-bound, paper, book with a page for each employee, with a photograph, a brief resume and contact details. Such a simple tool that was so useful. I can see how this early face book could develop into an intranet maintained by the individuals with the infromation they wish to share - personal profiles, wikis, RSS feeds, blogs, or potentially a list of publications that consultant has been involved in creating, skills, etc. Many organizations have intranets but I wonder if those begun recently giving users the capability to tailor their page to their own taste has a better chance of being adopted and used. Younger employees familiar with social networking are more likely to make full use of a system designed with them in mind.