Bing's new webmaster tools help you monitor how Bing (Microsoft's search engine) sees your site content. You need to set up an account to get started, and then verify your site ownership by uploading a small file or meta tag to existing page. You can also provide the address of you online XML sitemap.

Once verified, Bing Webmaster Tools will show you a summary of your top 5 pages, crawl issues (if any), backlinks to your site (seems to show more than Google Webmaster Tools does), all of your outbound links, a keyword performance tool, and a ping tracker of your sitemaps.

So far, I am not finding the keyword tool very helpful. It just shows you solid bars if it finds your chosen keywords in your pages (and lists the pages) and does not show rankings. Perhaps this will be improved sometime soon.