Let your users bring LinkedIn profiles and networks with them to your site or application.
http://developer.linkedin.com/index.jspa
JavaScript Libraries and Functions
Get access to data on 2,035,043 websites that are LinkedIn Platform API Customers. We know of 335,048 live websites using LinkedIn Platform API and an additional 1,699,995 sites that used LinkedIn Platform API historically and 194,844 websites in the United States.
Get a list of 2,035,043 websites using LinkedIn Platform API which includes location information, hosting data, contact details, 335,048 currently live websites and an additional 263,012 domains that redirect to sites in this list. 1,699,995 sites that used this technology previously and 194,844 websites in the United States currently using LinkedIn Platform API.