Google Sitemaps has been renamed to Google Webmaster Tools and there’s a new Google Webmaster Central Blog, your one stop source for information regarding crawling and indexing on Google.

Google Webmaster Tools provides tools and information to keep you informed and increase your crawl coverage and visibility on Google.

For example, if you notice your site is being indexed using both versions of your domain (www and non-www), you can now tell Google your preferred domain URL format for crawling and indexing. Check it out.