I've used Hanumant&Jignesh book along with the specs. The book is excellent, especially for those with less experience or those who don't want to deal directly with the
servlet specs and
jsp specs.
I've found the exam relatively easy, no tricky questions; they've tested only knowledge.
The mocks that came with the attached CD have about the same level of difficulty as the exam.
Good luck anyone.
Adrian Muscalu