You have until Monday, June 30th to register for a certification voucher that entitles you to a 50% off the price of an exam fee... if you've purchased one of the cert guides. For details see: http://www.ibm.com/developerworks/blogs/page/SusanVisser?entry=follow_the_pig
Follow the pig!
The promotion has been hugely successful! If you were one of the many people who has already received a voucher, good luck on your exam! You'll be happy to know that the book you bought is proven to help people prepare for the exams... not only because of the content, but because of the sample questions and answers that are in the books.