Here’s a WordPress plugin that will create an XML-Sitemap that can greatly enhance your website’s presence, which is supported by Ask.com, Google, Yahoo! and MSN Search.
Here are also some links to help you with SEO (Search Engine Optimization) ranking:
http://www.google.com/support/webmasters
http://search.yahoo.com/info/submit.html
http://about.ask.com/en/docs/about/webma…
http://search.live.com/docs/submit.aspx
Hope you find this post helpful.