Look into Google and Yahoo and how they view your site.
Google and Yahoo both provide useful pages to help website owners.
Googles is possibly the most useful between the two with pagerank information, crawler details etc.
Visit Yahoos at: http://siteexplorer.search.yahoo.com
Visit Googles at:http://www.google.com/webmasters
Im not aware of any others, but I will add them if I find any.
So many cool tools - and so little time. .. .
[tags] google seo, yahoo seo, search engine, wordpress, sitemap, pagerank [/tags]