By 2nd February, 2014 I gave my magento certification exam and pass with score 69 of 70. I share some information about preparation exam.
For passing or getting good score in this exam, you must have very decent experience in Magento.
1. Get a study guide under resource tab http://www.magentocommerce.com/certification/
2. I went through the Fundamentals of Magento videos available on Magento website.
3. Here some excellent tutorial that great help of exam.
Best of luck!