Is YPN (Yahoo Publisher Network) really closing?

YES! Yahoo issued a notice that they would stop operations April 30. Yahoo! continuously evaluates and prioritizes our products and services, in alignment with business goals and our continued commitment to deliver the best consumer and advertiser experiences. After conducting an extensive review of the Yahoo! Publisher Network beta program, we have decided to close the program effective April 30, 2010. They recommend that publishers remove the code before the 30th Because our content will no longer be delivered to your ad unit spaces after April 30, 2010, we recommend removing all YPN ad code from your pages by that date. Interestingly, they recommend that publishers turn to Chitika for their contextual advertising needs. For the opportunity to continue earning revenue, we suggest using Chitika, a leading advertising network that syndicates Yahoo! Content Match and Sponsored Search ads. Chitika has set up a special process for YPN beta publishers to participate in its platform.