Bing webmaster guidelines provide guidance on links, SEO, social media, content & others. These can be accessed under the content guidelines section. Technical part covers robots.txt, sitemap, site technology, redirects & others. It calls out to avoid cloaking, link schemes, social media schemes & duplicate content. They have also introduced Bing webmaster webinars covering different topics during Nov to Feb. More information about the webinars can be found here. From an SEO point of view, it covers all the major important issues.404 pages best practices is also included covering no advt, page returns a 404 status code & smart 404 pages.