Linkedin - business version of Facebook?

Patrick Dixon http://www.globalchange.com Linkedin future of business online community or just a phase?
Linkedin is the business version of FaceBook or MySpace and had 11 million executives signed up by June 2007. But does this business inline community really work? Most Linkedin users have less than 50 contacts and don't use it much. Recruitment, sales, marketing, promotion -- all possible but what will be the dominant purpose of Linkedin? Most contacts I've had are people wanting introductions -- to other people they don't seem to be able to get to any other way. Comment by Dr Patrick Dixon, futurist, leading authority on global trends and conference speaker.