tedster - 2:52 pm on Mar 17, 2011 (gmt 0) [edited by: tedster at 2:53 pm (utc) on Mar 17, 2011]
Sitemaps are a supplement to Google's regular crawl, so that report you see does not mean those are the only pages Google is crawling and indexing.
More than that, it is common to see the "0 indexed" message for a new sitemap submission. There seems to be a reporting lag before the crawl of the sitemap shows up in Webmaster Tools.
[edited by: tedster at 2:53 pm (utc) on Mar 17, 2011]