Passed a few days ago) I've prepared by reading "Sun Certified Programmer for Java 6" by Kathy Sierra and Bert Bates. Really great book!
The day before exam I've passed a few demo versions of some preparation kits and was a little bit scared by their difficult questions such as for example about priority queue, that is when you iterating over it you can't call poll() and size() methods at a time, because you'll get ConcurrentModificationException. I thought that it's time to learn Java specification completely
But! The exam was much more easier than I thought. I guess next will be the SCWCD