Ever wonder exactly what a search engine robot or spider sees when it crawls your site? Dump your URL into the Search Engine Spider Simulator. Description borrowed directly from SiteLines, the newest addition to the Weblogs queue:

The Sim Spider Search Engine Robot Simulator is a spider that simulates what search engine robots read from your website. Readers can input a web page URL and visualize the links that will be spidered, the "word dump" that will go into the database, and keyword density analysis for each page. This is a highly illustrative example of the difference between the page you see on the screen and the content that actually lands up in the search engine's database.