I've been using SCWCD Exam Study Kit by Deshmukh and Malavia.
I assume that this book is not fit for the new exam, but that
problem should be solved soon enough when Kathy and Bert have finished
there Head First book on
jsp and
servlets (my voucher unfortunately
expired before the release).
The things that I found hardest on the exam where related to web.xml
and all strange naming conventions (or rather lack of). If you are
going for this exam and want high score, make sure that you speak
web.xml tags as if it had been your first language. ;-)