engine - 1:26 pm on Apr 1, 2010 (gmt 0)

Yahoo eventually posted this news on their blog.

Yahoo! Self-Service Beta Program for Small Publishers to Close April 30 [ypnblog.com]

Decision does not affect large, direct publishers and partners, nor advertisers using Content Match Earlier today, Yahoo! emailed a small group of publishers participating in the Yahoo! Publisher Network self-service beta program (also known as “YPNO” or “Yahoo Publisher Network Online”), to inform them that we have decided to close the program effective April 30, 2010. This only affects our self-service platform for small publishers who syndicate our Content Match (contextual) listings. No change for large partners/affiliate network No change to Content Match ads