Online social networks take that local network you have and make it global. There's even a new word for it -- globalization. You can search for a job in your area via your social network's job boards.
For example , LinkedIn.com
With more and more employers and recruiters turning to LinkedIn to research candidates for their job openings, building and maintaining a professional, credible and persuasive LinkedIn profile is no longer optional if you want to fast-forward your job search." LinkedIn is rapidly becoming a vital tool for job seekers, in all stages of their careers.