Yahoo announced they are closing down the Yahoo Publisher Network, which is the self-service contextual ad network that was set to compete with the extremely successful Google AdSense network. Yahoo’s version has always been a failure when compared to Google, for many reasons.

Yahoo said:

At least, people will stop posting in the forums about how they can get accepted into the YPN program.

Forum discussion at WebmasterWorld, Search Engine Watch Forums and DigitalPoint Forums.