Since Web Content Integrator Feed Service Servlet is not currently documented by the formal product wiki, this document helps developers and designers to understand how and when to use this Servlet.
The attached document focuses only on the Feed Service Servlet part of the whole Web Content Integrator solution, that is shipped with WebSphere Portal starting of version 6.5.1 and on-wards. The document assumes that you have the latest Portal version installation with the latest cumulative fixes. At the time writing this document, there was v18.104.22.168 and a latest interim fix of (22.214.171.124-WP-WCM-Combined-CFPM94847-Server-CF08) issued in Oct 8, 2013
Here are the recommended fixes for WebSphere Portal (126.96.36.199, Linux) from Fix Central, where we should install the latest releases.