I've studied to SCWCD and SCBCD by using "Head First Servlets & JSP" and "Head First EJB". Now I'm studying to take SCEA 5, but I haven't found many good references about it. Are there any projects to a "Head First" version about JEE 5 Architecture?
Hopefully we will never have a HF for SCEA. The SCEA requires that you read from various books and there is no single reference that can help you. You will have to refer to various books covering various range of subjects. A single book spanning say 1000 pages meant to be a study guide would not do justice to the exam. This applies to the old and new SCEA
I think if you have read Head First EJB, Head First JSP & Servlet, Head First Design Pattern, these books have already covered a large portion of the syllabus of SCEA. I indeed hope that a Head First book for EJB3 will be out in the future.