A New Googlebot Crawler From Google?

Google may be crawling the web with a new crawler, a new Googlebot, named GoogleProducer. This useragent is not listed on the official Google crawlers page but maybe it is too new to be listed yet?

Microsoft Bing: lastmod Tag In XML Sitemap File Is Critical

Microsoft Bing posted a new blog post saying “for XML sitemaps, one of the most critical tags you can include in your sitemap is the “lastmod” tag.” And it will become even more critical as Bing is reworking its crawl scheduling stack to rely more on this lastmod field.