If you use Google`s Webmaster Tools you might also be interested in the one for Microsoft`s search engine-Bing.
http://www.iblogzone.com/2009/06/using-bin...nter-tools.htmlCrawl Issues Tool: The Crawl Issues tool enables you to see issues Bing has identified while crawling and indexing your website. Here you will be able to see problems such as, file not found (404), blocked content, malware infections, etc.
Backlink Tool: The Backlinks tool gives you access to the list of URLs that link to your website. These links are also called inbound links. Often these links are from webpages that links to your products or organization. Identifying such webpages can be valuable as a means of identifying sources of promotion, feedback, or both for your website. You can also see the power of those links by looking at the green boxes:)
Outbound Links Tool: The Outbound Links tool provides you with a list of URLs leading to other websites that Bing found on your website. You can also check whether any of your links point to an infected site or you can filter your results to target specific parts of your website.
Keywords Tool: Use the Keywords tool to see how your website performs against searches for a specific keyword or key phrase. This tool is useful for understanding how users (who often choose websites based on keywords searches) might find your website.
http://www.bing.com/webmaster