Hmmmmm....Click to Action and Portlet Wiring....
Here's a link that takes you to the WebSphere Portal Server InfoCenter, providing information on co-operative portlets, Portlet Services and the IBM Portlet API.
WebSphere Portal Version 6 InfoCenter and Documentation Here's the specific section on cooperative portlets:
Working With Cooperative Portlets in WebSphere Portal Server WPS 6 For what it's worth, here's a link on what is new with WebSphere Portal 6, and the new features that added that weren't in WebSphere Portal 5:
Differences Between WebSphere Portal 5 and WebSphere Portal 6 Hope this helps!
-Cameron McKenzie