Yahoo has launched a blog for the Yahoo! Publisher Network. The blog is at http://www.ypnblog.com/ and will contain "latest on issues, new releases, and tips—but also in-depth how-to's, publisher interviews, industry trends, links to articles and other news and information you can use." Jennifer has a full write up here on the YPN Blog.
Forum discussion is at Search Engine Roundtable Forums, WebmasterWorld and DigitalPoint Forums.
