There have been some questions on how to create and where to submit a sitemap. Great blog article explaining it http://www.packetfog.com/blog/2009/evolution-of-sitemap-html-sitemap-xml
Sitemaps suck don't submit it to googlewebmaster tools. if you do you risk getting pages deindexed. don't say i didnt warn anyone. If you do need one block googlebot in your robots.txt from crawling it.