JSR 168: Portlet Specification posted which is combined versions of previous JSRS Posted by IBM and SUN. The Portlet specification will define a Portlet API that provides means for aggregating several content sources and applications front ends. It will also address how the security and personalization is handled.

read more @ http://www.jcp.org/jsr/detail/168.jsp

read the heated discusstion on this JSRS @
http://www.theserverside.com/discussion/thread.jsp?thread_id=11106.