This week's book giveaway is in the OCMJEA forum. We're giving away four copies of OCM Java EE 6 Enterprise Architect Exam Guide and have Paul Allen & Joseph Bambara on-line! See this thread for details.
in a portal we will have n number of portlets if we want to exchage data between to portlets we go for Page Flows in weblogic/events(sun provided jsr 168 specification(it is a java class) which is generic to all portal servers)
just try to create a portal with two portlets in one portlet specify userName, passWord and save button when save button is clicked capture the data in the second portlet and display. to capture write a java class (jsr 168)