This week's book giveaway is in the Other Open Source APIs forum. We're giving away four copies of Storm Applied and have Sean Allen, Peter Pathirana & Matthew Jankowski on-line! See this thread for details.
You can also go to http://www.learnkey.com/custom_pages/masterExam.htm to register (free) and download a practice exam. It's very like the actual exam, with 60-odd timed questions. I was got 86% in this and got 83% in my SCJP, so they're spot on the difficulty level.