Here are the links to the three main search engine webmaster pages . They will allow you to enter your sitemap and give you other useful bits and bobs.
Google Webmasters lets you upload your sitemap (http://www.xml-sitemaps.com will help you quickly create one to Google standards.) and check what pages Googles looking at. One nice bit is that it will show you what search result you are for queries.
Yahoo submit site will let you add your site and feed to Yahoo's engine.
MSN Live webmaster enter your site to MSN and check what backlinks you have.