The Google Webmaster Central Blog has posted a Sitemaps FAQs blog post. In this blog post, Google responds to some of the most asked questions on the Sitemaps protocol and how Google supports it.
Some of the questions include:
- Does a Sitemap submission guarantee page inclusion?
- Can submitting a Sitemap hurt my site?
- Will my rankings improve if I submit a Sitemap?
Check out the full FAQs over here.