As of yet, the JEE5 resources focussed on SCEA5 are limited. But things like design patterns and best practices don't change too much, so getting your hands on some design pattern books isn't a bad idea.
read the javaee blueprint more than any other document. mz has an excellent reviewer you can check it out http://java.boot.by/scea5-guide/. i doubt if there are any other useful whitepaper out there since this is a new certification.