Recommended Study Resources
Transcender offers award winning practice exams. They offer a CD with 164 practice questions and 244 flashcards with an exam voucher for $209.
MCTS Self-Paced Training Kit (Exam 70-432): Microsoft SQL Server 2008-Implementation and Maintenance by Mike Hotek
If you plan to continue on the to the MCITP exam, SQL Server 2008 Administration: Real-World Skills for MCITP Certification and Beyond by Tom Carpenter covers both exams (70-432 and 70-450). It is a good resource packed with a lot of practical information, but it should not be your only study resource.