I liked the Bridgewater Exam Preparation Book. Even though it was scattered with millions of mistakes, it was a good drill and resource. After all the mistakes kept me thinking and focused ;).
JDBCSupport - An easy to use, light-weight JDBC framework -
Sebastian, I must agree with you. Now I'm also preparing to SCWCD using the same book.
Inspite of multitude of mistakes it offers you a well-structured materials and VERY tough mock questions at the end of every chapter.
SCJP 6.0(95%), SCWCD 5(94%), SCJD (working on B&S v.2.3.1)