Qt are now offering a 20% discount on the Qt Advanced Exams to those who take the Qt Essentials Exam before the end of 2010.
Qt Essentials:
To become a Nokia Certified Qt Developer, you must pass the Qt Essentials examination. Programming skills and hands-on development experience with Qt are necessary to pass the exam.
Source: http://qt.nokia.com/developer/learning/news/learning-events/20-discount-off-qt-certification-exams