World Wide Web Consortium's Ivan Herman Talks About the Semantic Web - Georgia Straight

If you website has duplicate content, here is a good article on how to Getting Rid of Duplicate Content Issues Once and For All.

Particularly, if you have exact duplicate content, and you just don't want to change your website, you can:

Here are some helpful articles for submitting sitemap to search engines

• How to Submit your sitemap to Google, Yahoo, and MSN 
• http://www.websecurity.mobi/webmaster-tool-sitemap-generator/72-how-subm...

Besides, below are some more URLs to submit:

This article in Goggle Webmaster Center, Best practices when moving your site, is a great reference to moving a site.

The main points are: