Other info:
LinkedIn is a business-oriented social networking site founded by Reid Hoffman in December 2002 and launched in May 2003. LinkedIn is mainly used for professional networking. The purpose of the site is to allow registered users to maintain a list of contact details of people they know and trust in business. The people in the list are called Connections. Users can invite anyone (whether a site user or not) to become a connection.
Key features:
Employers can list jobs and search for potential candidates.
Job seekers can review the profile of hiring managers and discover which of their existing contacts can introduce them.
-LinkedIn Answers which allows you to ask questions for the LinkedIn community to answer.
-LinkedIn Groups which allows you to establish new business relationships by joining alumni, industry, or professional and other relevant groups.
Mobile version of the site which gives access to a reduced feature set over a mobile phone at m.linkedin.com
My opinion:
This is really the most trusted professional social networking site out there.
My (Profile) link:
http://www.linkedin.com/in/cceerpp