Simple LinkedIn PHP is a library for interacting with the LinkedIn API. The library was designed and tested for PHP 5.2+ and is not expected to work with PHP 4. The only prerequisite for Simple LinkedIn PHP is the PHP cURL library.
Facebook is about to squeeze your apps. Later this month the social networking giant will decrease the width of applications that display on a user's profile page. The move, planned for some time, will reduce the horizontal screen real estate for applications by over 30 percent.