I just now cleared the SCJP 6.0 exam with 90%(Scored 65 for 72 questions).
First of all I should thank Kathy and Bates for the wonderful SCJP 6.0 Study Guide.
I spent a total of 7 days for the preparation as I'm already working with Java for past 2 years. The Study Guide(especially the practice questions at end of each chapter) helped a lot in aligning the thought towards the exam. And the LearnKey MasterExams provided in the companion CD are simply superb. Also the software closely imitates the real exam scenario.
Also, thanks to the wonderful ranch and the members who are contributing to the threads.
So, for experienced guys I would simply suggest the book and mock tests that came with the book. You are good to go.
(I also bought the SCJP 6.0 practice exams from techfaq but the question there are simply horrible. I just saw some 10 questions out of which every question is of horrible quality and 3 are actually wrong. I didn't touch those practice exams again)
On a completely different note, I wasn't actually very happy with the completion of certification since I came to know about so called "certification question ---" with the help of which some people are able to easily complete and even score superb. Is there something that Sun can do to avoid this?
Anyways, since the pre-requisite for SCJD is finished now I will concentrate on it.