Forum entry on WebmasterWorld.com under General Search Engine Promotion and Marketing Issues. This thread discusses Sitemap XML file creation for websites with over 500,000 pages, dealing with the limitations of the Sitemap XML file protocol.

Digital Point forum for Google Sitemaps. Threads include Sitemap generators, errors with Sitemap XML files, submitting Sitemaps to Google, Google Sitemap help, third party generators, Sitemaps with search engine optimization, and more.

General Discussion forum for Google and Yahoo Sitemaps from vBulletin Search Engine Optimization, the world's largest community focused on SEO. Threads include Google/Yahoo Sitemap generators, submitting the Sitemap, maximum URLs in XML Sitemap files, errors with Google Sitemap, removing the Sitemap, and more.

Discussion from the “Google Optimization” section of the SEOchat.com forums entitled “Google Sitemap XML Caused Ranking Drop?” Members discuss a case in which an established, 100,000+ page site suddenly lost its high SERP (Search Engine Results Page) rankings after implementing and submitting an XML sitemap.